Transmission of bulldozer t 170 diagram

Device, spare parts and components.

SPARE PARTS FOR TRACTORS
ADJUSTING MTZ TRACTORS ___________________

DIESEL ENGINE PARTS ___________________

MTZ SPARE PARTS CATALOG ___________________

TECHNICAL CHARACTERISTICS OF TRACTORS ___________________

SPECIAL EQUIPMENT BASED ON MTZ AND ATTACHMENTS ___________________

AGRICULTURAL MACHINERY AND EQUIPMENT ___________________

Transmission design of the T-170 bulldozer

The mechanical multi-stage transmission of the T-170 bulldozer consists of a clutch, a gearbox with switching mechanisms, a main gear with bevel gears, final clutches, brakes, final drives, a lubrication system and a transmission control system.

Clutch T-170

Figure 1. Clutch T-170

The bulldozer clutch (Fig. 1) of dry friction, permanently closed with two driving and two driven disks, is mounted between the diesel engine and the gearbox.

The driven discs of the T-170 clutch rotate together with the drum on closed bearings mounted on a trunnion attached to the diesel crankshaft.

The drive and pressure disks rotate together with the flywheel.

Rotation is transmitted to the upper shaft of the T-170 bulldozer gearbox through a cardan shaft and gear couplings.

When the clutch is disengaged, the release clutch, moving backward, pulls three levers, which, through fingers acting on the pressure plate, compress the spring package, providing clearances between the drive and driven discs.

At the end of the pedal stroke, brake 14, in contact with the friction lining with the release bearing housing, stops the upper shaft of the gearbox, ensuring shockless gear shifting.

On the outside, the clutch is protected by a casing: Turning it off is facilitated by a servo mechanism included in the hydraulic control system (Fig. 2).

The clutch of swamp tractors has an extended shaft.

Figure 2. Hydraulic control system for bulldozer T-170

The clutch is removed from the tractor without dismantling the diesel engine and the upper half of the clutch housing.

To do this, it is necessary to unscrew the drain pipe fitting 5 (Fig. 2) from the servomechanism body and disconnect the pipe.

Re-screw the fitting into the housing of the servomechanism of the T-170 bulldozer, this will protect the piston of the servomechanism from lowering into the non-working position and jamming.

Remove the lower half of the clutch cover. Disconnect the clutch release lever 19 (Fig. 1) from the linkage to the servo mechanism, the bolts securing the clutch to the upper gearbox shaft and the brake cover 14 to the clutch.

Together with the clutch, move the cardan shaft 17 all the way towards the release clutch 13.

Remove coupling 16, tighten flange 2 and pressure plate 3 through the holes in the flange with three M12x35 bolts and disconnect the bolts securing the flange to the flywheel, while holding the T-170 coupling from below or through the hatch in the upper half of the casing.

Moving the T-170 bulldozer clutch to the gearbox, pull it down.

Install the coupling in the reverse order.

T-170 bulldozer gearbox

The T-170 bulldozer gearbox has 8 forward and 4 reverse gears (for swamp tractors - 6 and 3, respectively), mounted in a separate housing and attached to the front wall of the onboard clutch housing.

The gearbox is four-shaft with constant mesh gears.

Each gearbox shaft is double-supported on three rolling bearings, of which the front one is ball and the rest are roller.

On the intermediate shafts, the gears are mounted on splines.

On the upper and lower shafts, the gears rotate freely on bushings.

On complete sets of T-170 tractors, adapted for power settings, the upper and intermediate shafts are made with splined shanks for connecting the PTO and creeper.

The gears are switched by two levers of the shift mechanisms, with the help of which the gear couplings on the upper and lower shafts are moved by forks.

The VK-418 start blocking switch is installed on the right range switching mechanism.

In the gear shift mechanism on swamp tractors, the levers are moved forward, and the spacer, lever and roller are changed accordingly. The front wall of the gearbox is removable.

In the gearbox of the T-170 bulldozer of swamp-moving modifications of tractors, the first gear is blocked.

The blocking is carried out using a stop sleeve, which prevents the shaft and fork from moving in the direction of engaging 1st gear.

Assembly of the tractor gearbox T-170, T-130

_______________________________________________________________________________________

When assembling the gearbox of the T-170, T-130 tractor, the following requirements must be observed: - rubbing surfaces, smooth gear holes and the outer surfaces of the plain bearing bushings are lubricated with transmission oil; — the inner and outer rings of cylindrical roller bearings must be of the same group; — the front cover and gearbox housing of the bulldozer T-170, T-130 should not be disassembled and processed as an assembly; the same serial numbers are marked on their upper surfaces; — before installation on the shafts, roller and ball bearings are heated in an oil bath to a temperature of 80 ... 100 ° C; — the lower shaft of the T-170 (T-130) gearbox is equipped with a bevel gear of the main gear; dismantling of this conical pair is not allowed; — movement of the gearshift levers of the tractor T-170, T-130 from the neutral position to the right or left until failure should occur with a smoothly increasing force of elastic resistance of the springs; — the movement of the rollers with forks must be free, with clear fixation of the neutral and working positions; — the rotation of the levers of the clamp rollers must be free, without jamming in the neutral position of the gear shift lever and in positions corresponding to the full engagement of any gear; When the clamps are locked, movement of the rollers is not allowed; — when moving the roller with the fork from the neutral position to the working position, the other roller must be securely locked with a ball lock in the neutral position; — the studs are installed on red lead with iron grease; — the normal gap between the hole in the gears and the outer surface of the bushings should be 0.12 ... 0.21 mm; permissible gap 0.3 mm; — the normal lateral clearance between the splines of the upper shaft of the T-130/170 gearbox and the gear bushings should be 0.146 ... 0.424 mm; permissible gap 1.0 mm; — the gearbox of the tractor T-170, T-130 is supplied as spare parts complete with a bevel gear. When replacing the gearbox, the main gear bevel gear must be replaced at the same time. The serial number of the bevel gear is marked on the gearbox housing. Assembly of the upper gearbox shaft of the bulldozer T-170, T-130 Fig. 4. Upper shaft of the T-170, T-130 gearbox The upper shaft of the T-170, T-130 gearbox (1) (see Fig. 4) is installed in the device with the surface with the keyway down. Sequentially install ring 3, bushing b, gear 4, couplings 5 and 8, second bushing b, gear 7, second couplings 5 and 5, third bushing b, gear 9 and bushing 10 onto the shaft. When installing couplings and bushings, the grooves have the splines removed combined with lubricant supply channels in the upper shaft. Install clamp 12 with spring 11 on sleeve 10 with the flat facing towards the lower shaft and align the lubrication holes. Install gear 13 and bushings 14 and 19 on the upper shaft. Having moved the parts installed on the shaft until they stop, install the pack of gaskets 18 so as to provide a gap A of 0.05 ... 0.3 mm between the sleeve 19 and bearing 15. Gaskets 2 mm thick are installed on both sides of the pack. Heat the bearing 15 in an oil bath to a temperature of 80 ... 90 °C and, having pressed it onto the shaft, put on the lock washer 17 and tighten it with a nut 16 with a tightening torque of 450 ... 550 Nm. Bend the lock washer onto the edge of nut 16. Turn the upper shaft over. Bearing 2 is heated in an oil bath to a temperature of 80 ... 90 °C and pressed onto the shaft until it stops. On the assembled upper shaft of the T-170, T-130 gearbox, the gears should rotate freely on the bushings, and the couplings should move without jamming. Assembly of the first intermediate shaft of the T-170, T-130 gearbox

Fig.5. The first intermediate shaft of the T-170, T-130 gearbox The first intermediate shaft of the T-170, T-130 gearbox (15) (see Fig. 5) is installed in the device with the splined surface up and sleeve 14 is put on it, gears 2, 3 and 4 and ring 13. Next, assemble gear 7 with rings 5, bearings 12, spacer 6 and press it onto the shaft until it stops against ring 13. Put on ring 11. Heat bearing 8 in an oil bath to a temperature of 80 ... 90 ° C and press it onto the shaft stops against the ring 11. Install the lock washer 9, screw the nut 10 with the machined end to the washer, tighten it with a tightening torque of 450 ... 550 Nm and lock it with the washer 9. Turn the shaft over. Heat bearing 1 in an oil bath to a temperature of 80 ... 90 ° C and press it onto the shaft until it stops. Assembly of the second intermediate shaft of the T-170, T-130 gearbox

Fig.6. The second intermediate shaft of the gearbox of the bulldozer T-170, T-130 The second intermediate shaft of the gearbox of the bulldozer T-170, T-130 (see Fig. 6) is installed in the device with the threaded end up and assembled with gear 10, bushing 9, gears 8 and 7, bushing 6, gears 5 and 4. Having moved the gears and bushings until they stop, install the gasket package 3, ensuring a gap A = -0.05 ... 0.3 mm between the end of gear 4 and the end of the inner ring of bearing 2. Gaskets 2 mm thick is installed on both sides of the package. Bearing 2 is heated in an oil bath to a temperature of 80 ... 90 °C and installed on the shaft. Turn over shaft 1. Heat bearing 11 in an oil bath to a temperature of 80 ... 90 °C and press it onto the shaft until it stops. Install retaining ring 12. Assembling the lower shaft of the bulldozer gearbox T-170, T-130

Fig.7. Lower shaft of the T-170, T-130 gearbox The lower shaft of the T-170, T-130 gearbox (see Fig. 7) is installed in the device with the bevel gear down. Bearing 17 is heated in an oil bath to a temperature of 80 ... 90 °C and installed on the shaft until it touches the collar. Next, install sequentially bushings 16 and 11, gear 15, couplings 14 and 9, second bushing 11, gear 13, spacer 12, third bushing 11, gear 10, couplings 8 and 9, bushing 7, gear 6, ring 5 and bushing 4. Having moved all the parts until they stop, install the gasket package 3 so as to provide a gap A = 0.05...0.3 mm between the end of the bushing 4 and the inner ring of the bearing 2. Gaskets 2 mm thick are placed on both sides of the package. Bearing 2 is heated in an oil bath to a temperature of 80 ... 90 ° C and pressed onto the shaft until it stops. When assembling the lower shaft of the T-170, T-130 gearbox, it is necessary to align the groove with the removed spline in the couplings and bushings with the holes for supplying lubricant to the bushings in the shaft. The lower shaft of the gearbox is installed complete with a final drive bevel gear tested for tooth engagement. Assembling the shafts of the T-170, T-130 gearbox with the front cover. The upper shaft 4 is installed on the bench table so that the distance from the end of the teeth of gear 8 (see Fig. 4) to the plane of the device is (126 ± 0.06) mm. This size is set using a template. The specified size ensures the distance Г = (126 -0.2) mm in the assembled gearbox (see Fig. 8).

Fig.8. Gearbox T-170, T-130 in section Install the first intermediate shaft T-170, T-130 in the device so that the protrusion of the ends of the teeth of gear 8 (see Fig. 1) of the upper shaft in relation to the ends of the teeth of gear 2 (see Fig. Fig. 5) of the first intermediate shaft was (2 ± 0.5) mm. Install the shafts into the fixture at the specified dimensions by rotating the handles. Install the second intermediate shaft 5 in the device so that the gap between the ends of gear 2 (see Fig. 5) of the first intermediate shaft and gear 7 of the second intermediate shaft is within (4 ± 0.5) mm. Install the lower shaft of the T-170 (T-130) gearbox. Place the front cover on the pins and the plane of the device and press it with clamps.

Fig.9. Gearbox T-170, T-130 view B. Having placed the gasket package 108 (see Fig. 9.10) onto the flange of the upper shaft bearing housing 99 and the sealing ring, install the bearing housing into the front cover 2.

Fig. 10. Gearbox T-170, T-130 type A Press the outer ring of bearing 109 until it stops into the shoulder of the bearing housing of the upper shaft 99. Heat bearing 100 in an oil bath to a temperature of 80 ... 90C and press it onto the upper shaft 103 until it stops into bearing 109 numbered ring up, install the oil deflector 106 and the key 105. Lubricate the gasket 107 with sealant and install it on the flange of the bearing housing of the upper shaft 99 and install the cover 27 of the upper shaft and secure it together with the bearing housing with bolts 25 with spring washers 26. Place the rubber ring 104 on the cover of the upper shaft Flange 7 is heated to a temperature of (260 ± ± 10) °C and pressed onto the upper shaft 103.

Screw the nut 102 onto the upper shaft 103 until it touches the flange 7 and lock it with two bolts 101 with spring washers. Check the size D (126 ± ± 0.2) mm and, if necessary, adjust with gaskets 108. Place the package of gaskets 96 and the sealing ring on the bearing housing 98 of the first intermediate shaft of the T-170, T-130 gearbox, install it in the front cover 2. Press it in the outer ring of bearing 109 into the bearing housing 98 until it stops, with the number on the ring facing up. Bearing 100 is heated in an oil bath to 80 ... 90 °C and pressed onto the first intermediate shaft 80 until it touches bearing 109. Install the lock washer with the internal antenna in the keyway of shaft 80, screw the nut 97 with the machined end to the washer and bend the ends of the washer on the edge of the nut . Lubricate the gasket with sealant on both sides, install it and cover 4 on the flange of the bearing housing 98 and secure with bolts 25 with spring washers 26. Check the size (2 ± 0.5) mm and, if necessary, adjust with gaskets 96. Put on a package of gaskets 95 and an O-ring onto the bearing housing 93 of the second intermediate shaft, install it in the front cover 2. Press the outer ring of the bearing 90 into the bearing housing 93 until it stops against the collar with the number on the ring facing up. Bearing 92 is heated in an oil bath to 80 ... 90 °C and pressed onto the second intermediate shaft 83 until it touches bearing 90. Install the lock washer with the internal antenna in the keyway of shaft 83, screw the nut 94 with the machined end to the washer and bend the ends of the washer on the edge of the nut . Lubricate the gasket on both sides with sealant, install it and the cover 32 on the flange of the bearing housing 93 of the second intermediate shaft of the T-170, T-130 gearbox and secure with bolts 25 with spring washers 26. Check the size (4 ± 0.5) mm and, if necessary, adjust with gaskets 95. Place the gasket package 88 and the sealing ring onto the bearing housing of the lower shaft 85, install it in the front cover 2. Press the outer ring of the bearing 90 into the bearing housing until it stops against the collar. Install the lock washer with the inner tendril into the keyway of the lower shaft 85, screw the nut 91 with the machined end to the washer and bend the ends of the washer onto the edge of the nut. The thickness of the package of adjusting shims 88 is finally set when adjusting the size D = 83.9 ± ±0.1 mm (see Fig. 8). Assembly of the gearbox housing T-170, T-130) The housing T-170, T-130 is installed on a stand. Lubricate the bearing seats in the box body with gear oil and install the outer rings of bearings 76, 78, 82 and 84, placing the slots for the stoppers opposite the holes in the housing. Install the stopper 74 into the housing hole until it stops in the bearing seat 76 and press the plug 73 until it stops into the housing seat. Similarly, install stoppers and plugs for bearings 78, 82 and 84. Place rubber ring 77 on cover 79 and install it in the T-170, T-130 gearbox housing. Install the retaining ring 81 into the groove of the box body. Press pins 3 and 86 (if they were pressed out) and bushing 110 into the housing holes. Lubricate the gasket on both sides with sealant and, together with cover 34, install it on the gearbox housing and secure it with nuts 35 and spring washers. Screw the magnetic plug 33 with the gasket into the cover 34. Assembly of the front cover with the gearbox housing of the T-170, T-130 tractor. The T-170, T-130 gearbox housing and the front cover must have the same serial number. The housing is installed on the stand with the mating plane down and secured with clamps. Lubricate gasket 87 on both sides with sealant and install it on the gearbox housing flange. Install the front cover 2, complete with shafts, onto the box body so that the pins 86 fit into the holes in the front cover. Insert spring 72 into the housing hole. Secure the front cover with 2 bolts 29 and washers. Turn the gearbox and set the lower shaft 85 to dimension D = (83.9 ± 0.1) mm between the end of the shaft and the plane of the gearbox housing T-170, T-130 with spacers 88. Dimension D is measured with the lower shaft 85 shifted inward gearboxes Lubricate the gasket with sealant and install it on the flange of the bearing housing 89. Screw the lubricant supply fitting into the cover 28, install it on the gasket and, moving within the gap between the bolts and holes, find a position where, when rotating the lower shaft 85, the fitting does not touch it . In this position, the cover is secured with bolts 25 with clamping washers 26. Screw two studs into the holes of the front cover 2 and, putting tripods 30 on them, secure them with nuts 31. Installation of gear shift shafts, forks and gearbox shanks of the bulldozer T-170, T-130 Turn the gearbox housing T-170, T-130 with the hatches of the switching mechanisms upward. Install the fork 65 into the annular groove of the upper shaft engagement clutch 103. Install the roller 66 into the body of the T-170, T-130 gearbox, passing it through the holes of the fork 65, and attach the shank 38 to it. Install two balls 111 into the bushings 110. Insert fork 64 into the annular groove of the engagement clutch of the upper shaft 103 and install the second roller 66 into the hole of the box body, passing it through the hole of the fork 64. Install the shank 38 on the roller 66, secure the shanks 38 to the rollers 66 with stoppers. They are secured with wedges 71 with nuts 62 of the forks 64 and 65 with the outer gear coupling centrally located relative to the inner one and in the neutral position of the shaft 66. The nuts are locked with 62 locking plates 63. Dimension B should be (21.5 ± 0.8) mm. The rollers must move freely. The plug is pressed in and the covers 24 are installed, using adjusting shims to maintain a gap of 0.3+1.2 mm between the cover and the ends of the rollers in the on position, and they are secured with bolts 5 with spring washers. Similarly, install forks 36 and 37 and rollers 66 for the lower shaft 85. Install the fitting for supplying lubricant to the upper shaft. Lubricate the gasket with sealant, place it on the oil pump flange and install the pump with the oil receiver in the hatch of the gearbox housing on the pins and secure it with bolts and spring washers. Assembling gear shift mechanisms for bulldozers T-170, T-130 When assembling the left shift mechanism, install spacer 40 on the workbench. The roller 60 is inserted into the holes of the spacer 40 and the lever 61. The springs 58 are inserted into the holes of the spacer, and the long spring is installed on the outside of the gearbox. Place ring 46, gaskets 47 and ball flange 48. Press pin 57 into lever 51 and install lever into ball flange 48 and lever hole 61. Put on second gasket 47, second ball flange 48, install ball flange 56 on gasket and secure with bolts 68 spring washers 67. Install ring 49, cover 55, cap 50, cover 54 and lock with cotter pin 53. Screw handle 52 onto lever 51. Lubricate gasket 39 with sealant and place it on left cover 22. Install left gear shift mechanism with spacer 40 on left cover 22 and secured with bolts and spring washers. The assembly of the right gearshift mechanism of the T-170, T-130 gearbox and its installation with a spacer 69 on the right cover 6 is carried out in the same way as the left mechanism, with the exception of the installation of the VK-403 switch, which is carried out in the following sequence: install a rubber rubber in the recess of the threaded hole ring 116 (see Fig. 6), locking plate 119, shims 117 (no more than eight), having adjusted with them the gap E - 0.3 ... 0.5 mm between the end of the switch and the cylindrical surface of the roller 60, screw the switch 118 until it stops and lock it with locking plate 119. Assembling the retainer housing with the shaft and installing it on the left cover of the T-170, T-130 gearbox. Insert the shaft 17 (see Fig. 10) into the hole in the housing of the retainer shaft 16, put the oil seal 13 on the protruding end of the shaft and press it in into the housing flush with the end of the housing. Place the lever 12 assembled with the tip onto the roller 17 and align the groove of the roller with the hole in the lever. Install stopper 10 and secure with nut 11 and washer. Install the thrust bar 75 by inserting it into the recess on the roller 17; install the guide plate 14 with gaskets, lubricating them with sealant, and attach the housing of the clamp shaft 16 to the left cover with 22 bolts and spring washers; press the plug 18 into the hole in the housing of the clamp roller 16. Similarly, assemble and install the second housing of the clamps with the roller on the right cover 6. Installing the left gear shift mechanism. Studs 70 are screwed into the gearbox housing T-170, T-130 and gasket 23 is placed, lubricating it with sealant on both sides. Install two clamps 112 into the grooves of the rollers in the neutral position. The flats at the top of the clamps should be located forward along the tractor. Install the left cover 22 assembled with the switching mechanism on two studs and two pins of the gearbox housing 1 and insert the levers 61 into the grooves of the shanks. Secure the left cover 22 assembled with the switching mechanism with nuts 9 with spring washers 8. Install the rubber ring 59. With the lever 61 in the neutral position, adjust the roller 60 to a size of (29 ± 1) mm from the end of the small boss of the spacer 40 and secure the lever 61 through the side hatch bolts 45 and secure with a lock washer. Install cover 44 with gasket 43 and secure with nuts 42 and spring washers. Place lock washer 115 and gasket 114 on plug 113 and wrap spacer 40 into the small boss until it is tight. The plugs 113 are screwed similarly into the threaded holes of the remaining bosses. Installation of the right cover assembly with the right gear shift mechanism is carried out in the same way. The movement of the rollers with forks must be free, with clear fixation of the neutral and working positions. When the clamps are locked, movement of the gear shift rollers is not allowed; this is ensured by adjusting the gap between the ends of the clamp and the shaft using gaskets 19 installed under the body of the shaft of clamps 16. The rubber ring 75 is glued with glue into the recess of the flange of the T-170 gearbox housing. With proper assembly of the T-170, T-130 gearbox, all shafts and gears should turn easily without jamming or jamming, switching the rollers with forks should be easy, without jamming, with clear fixation of the neutral and working positions, moving the gear shift levers from the extreme left position to the right and from the right to the left to failure should occur with a smoothly increasing force of elastic resistance of the springs. Installation of the gearbox of the tractor T-170, T-130 . Install a pin into the hole in the mating plane of the side clutch housing. The milled planes of the pin must be perpendicular to the straight line connecting the center of the 160 mm diameter hole with the center of the 16 mm diameter hole for the pin. Lubricate the groove on the mating surface of the side clutch housing with glue and install the ring. Check the presence of a ring in the groove of the mating plane of the box. The box is inserted between the side members and installed on the studs and pin, and the protruding end of the bearing of the lower shaft of the box is placed in the hole in the side clutch housing. The T-170, T-130 gearbox is secured to the studs with nuts and washers. The nuts are tightened crosswise, starting from the top studs. At the junction of the mating planes of the onboard clutch housing and the T-170, T-130 gearbox, gaps are not allowed. Lubricate the annular groove with glue and install the ring. Install the clutch, steering control mechanism and clutch housing. Connect the oil lines to the gearbox oil pump, oil supply fittings to the upper and lower shafts, bevel gear compartment and filter. The cabin with wings and floor panels are installed.

_______________________________________________________________________________________

970 Elite
TLB 860
Cat 422
Cat 428
Cat 434
Cat 444

3 CX Super
4 CX
5 CX
WZ30-25
XT860/XT870

_______________________________________________________________________________________

WB 97S
WB 93R
Hyundai H940S
B110
B115
Hidromek HMK 102B
Hidromek HMK 62SS

_______________________________________________________________________________________

Mobile cranes
Cranes manipulators
Motor graders DZ-122,143
Excavator EK-14
Kamaz truck repair
MAZ truck repair

TL 65
TL 120
TL 310

Cat 914
Cat 924
Caterpillar 950
Caterpillar 966

_______________________________________________________________________________________

LW500F
ZL30G
ZL50G
LW321F
XGMA XG932
XGMA XG955

Design of Terex, Komatsu, Cat loaders

ZW250
ZW310
ZW220
ZW180

W130
W170
W190
W270
L34

Adjusting the D-180 engine
Transmission T-170
Assembly of gearboxes T-170, T-130
Adjusting the T-170 clutch
Hydraulic and mounted systems T-170
Main gear T-170, T-130

Diesel injection pump D-160
Servo mechanism of clutch T-130, T-170
Onboard clutches T-130
Final drive of the T-130 tractor
Rotation control mechanism T-130

Hydromechanical transmission TO-18/TO-18B
Hydraulic system GMP TO-18/TO-18B Amkodor
Hydraulic system TO-18
Hydraulic system components TO-18/TO-18B Amkodor

_______________________________________________________________________________________

Design of rack and pinion hydraulic cylinders
Types of positive displacement hydraulic pumps
Rotary screw pumps - Design and operating principle
Characteristics and design of gear pumps
Pump control diagram in a closed hydraulic system
Hydraulic distributor device with proportional control
Hydraulic systems of special equipment - operation and maintenance
Application of hydrostatic transmissions for special equipment
Application of cartridge electrically controlled valves
Design and diagrams of cartridge plug-in hydraulic valves
Characteristics of Screw-in Hydraulic Cartridge Valves
Sequence valve and pressure reducing valve operating diagrams
Variable displacement hydraulic pump regulator
Load Sending System for Variable Pumps
Hydraulic distributors - Control systems
Control diagrams for working hydraulic units of special equipment

Transmission of bulldozer t 170 diagram

Tractor transmission T-170.01

The tractor's mechanical multi-stage transmission consists of a clutch, a gearbox with switching mechanisms, a main gear with bevel gears, final clutches, brakes, final drives, a lubrication system and a transmission control system.

Clutch

(Fig. 27) dry friction, permanently closed with two driving and two driven disks, mounted between the diesel engine and the gearbox. The driven disks rotate together with the drum on closed bearings mounted on a journal attached to the diesel crankshaft. The drive and pressure disks rotate together with the flywheel.

Rotation is transmitted to the upper shaft of the gearbox through the cardan shaft and gear couplings. When the clutch is disengaged, the release clutch, moving backward, pulls three levers, which, through fingers acting on the pressure plate, compress the spring package, providing clearances between the drive and driven discs.

The coupling is protected from the outside by a casing. Turning it off is facilitated by a servo mechanism included in the hydraulic control system of the tractor (Fig. 28). The clutch of swamp tractors has an extended shaft.

The clutch is removed from the tractor without dismantling the diesel engine and the upper half of the clutch housing. To do this, it is necessary to unscrew the drain pipe fitting 5 (Fig. 28) from the servomechanism body and disconnect the pipe. Screw the fitting back into the servomechanism body, this will protect the piston

servo mechanism from lowering into the non-working position and jamming. Remove the lower half of the clutch cover. Disconnect the clutch release lever 19 (see Fig. 27) from the linkage to the servo mechanism, the bolts securing the clutch to the upper gearbox shaft and the brake cover 14 to the clutch. Together with the clutch, move the propeller shaft 17 all the way towards the release clutch 13. Remove the clutch 16, tighten the flange 2 and the pressure plate 3 through the holes in the flange with three bolts M 12×35 and disconnect the bolts securing the flange to the flywheel, while holding the clutch from below or through the hatch in the upper half of the casing. Move the clutch towards the gearbox and remove it downwards. Install the coupling in the reverse order.

REASONS FOR THE POPULARITY OF THE T 170 GEARBOX IN THE SPARE PARTS MARKET

Along with a properly functioning diesel engine and tracks, the gearbox

is one of the most important factors in organizing the performance of the entire tractor.
In the domestic spare parts market, gearboxes are quite a popular product. This is due to the fact that most customers prefer to work with old tractor models, restoring them by replacing the most important components. At the same time, newer special equipment, both original and manufactured under license, will cost about 4.5-6.5 million rubles
, taking into account the recycling fee. Most construction and other companies simply cannot afford such a machine.

Thus, we can say that the gearbox is a popular replacement unit in a tractor produced by ChTZ, which is a four-shaft mechanism (otherwise it can be called a three-stage gearbox or a five-row planetary mechanism). It is equipped with control levers and has a total weight of about half a ton. The cost of such a device averages 70-150 thousand rubles (the price depends on whether the box is new or refurbished).

RULES FOR ASSEMBLY OF TRANSMISSIONS

When installing a gearbox, certain requirements must be taken into account. First of all, you need to take care of lubricating the outer surfaces of the bushings for sliding bearings, rubbing surfaces, as well as the smooth holes of the gears using transmission oil. Roller bearing rings (internal and external)

cylinder-shaped must necessarily belong to the same group.
In this case, before installation, ball and roller bearings must be preheated in an oil bath to a temperature of approximately 80 to 100 degrees
. The front cover, as well as the body, are marked with identical serial numbers on their tops, and these are machined during the assembly process.

The lower gearbox shaft is equipped with a bevel gear

related to the main gear.
Dismantling of these parts is strictly prohibited. The levers that change gears inside the gearbox must be moved from neutral to the left or right side, taking into account the evenly increasing force created by the resistance of the springs. And the shafts in the system, along with their forks, must move freely, while their neutral and working positions must be clearly fixed. The rotation of the levers is also free
with no jamming in all the provided locations that provide for the activation of a particular gear. In this case, the rollers do not move if the latches are locked.

When one shaft moves from the neutral position

, the remaining shafts must be firmly held in their positions by means of a ball lock.
The studs as part of the structure must be mounted on thickly ground red lead made of iron. When assembling, you also need to take into account the gap
between the outer race of the bushings and the gear hole, which should not exceed 0.3 mm (usually it is 0.12-0.21 mm). And the distance between the gear bushings and the spline side of the upper roller should be 0.146-0.424 mm (no more than 1 mm).

The assembled gearbox is equipped with a bevel gear, which is a spare part. When changing the gearbox, it is also necessary to replace this part, the serial number of which is indicated on the gearbox housing.

FINAL STAGE OF GEARBOX INSTALLATION

In the hole made on the plane near the roller, the bot clutches are installed. In this case, the routers for the pins should be positioned perpendicular to the straight plane that connects the central part of the hole with a diameter of 160 mm with a hole with a diameter of 16 mm for the pin. The groove, which is made on the clutch body, is lubricated with special glue

, after which the ring is installed. After this, the box is wound up and installed on the studs and pin, and the bearing with its outgoing end is fixed in the hole on the housing.

Box T170 and T130

tightly secured with washers and nuts, which are tightened in a cross pattern, starting from those located at the top.
Where the mating planes meet the box, the presence of backlash is eliminated. The groove is lubricated with glue, after which a ring is installed in it. Following this, the clutch with the casing and the rotating mechanism are installed. Oil lines
are connected to the gearbox pump along with fittings and bevel gears. So the oil is supplied through grooves to the lower and upper rollers. As a result, the cabin itself with wings and floor is mounted.