Gearbox Identification Data The identification plate (1) on the gearbox contains the following information: A. Gearbox type. B. Gearbox suffix. C. Manufacturer. D. Serial number.
Gearbox specification Gear ratios Manual gearbox JH1 Suffix First gear Second gear Third gear Fourth gear Fifth gear Reverse gear Main gear Tachometer JH1-004 11/37 22/41 28/37 34/35 39/32 11/39 14/59 21/19 JH1-013 11/37 22/41 28/37 34/35...
Preparing for repairs Note: All work on the gearbox must only be performed by suitably qualified personnel. When performing repair work on a vehicle, it is necessary to follow basic safety rules. The quality of repair depends primarily on...
Gearbox oil change Transmission oil specification Transmission Oil Change Procedure Draining oil from the gearbox 1. Place the vehicle on a two-post lift. 2. Loosen the mounting bolts and remove the engine protective pan. 3. Place a tray...
Removal the gearbox assembly 1. Place the vehicle on a two-post lift. 2. Loosen the mounting bolts and remove the engine protective pan. 3. Remove the front wheels from the vehicle. 4. Remove the front left fender liner. 5. Remove the front bumper....
Installing the gearbox assembly Note: Be sure to replace the outer differential seal and clutch thrust bearing with new ones after each removal. Do not lubricate the input shaft splines to install the clutch disc. Make sure the dowel pins are in place...
Installing the gearbox on a stand for disassembly and assembly Note: To perform repairs to any parts of the gearbox, there are two possible support methods: assembly stand (if available); workbench. Installing the gearbox on the stand 1. Remove the gearbox from the vehicle. 2....
Removal and installation the fifth gear housing Removal the fifth gear housing 1. Place the vehicle on a two-post lift. 2. Loosen the mounting bolts and remove the engine protective pan. 3. Remove the front left wheel from the vehicle. 4. Remove the front left fender...
Removal and installation gears and synchronizer of fifth gear Removal the gears and synchronizer of the fifth gear 1. Place the vehicle on a two-post lift. 2. Loosen the mounting bolts and remove the engine protective pan. 3. Remove the front left wheel from the vehicle. 4. Remove...
Installing the fifth gear gears and synchronizer Note: Be sure to replace the primary shaft nut, primary shaft nut washer, secondary shaft bolt, and fifth gear shift fork pin with new ones. 1. Using a cleaning agent, clean the ends of the gearbox shafts. 2. Apply a...
Disassembling the gearbox 1. Remove the gearbox from the vehicle. 2. Place the gearbox on for disassembly. 3. Remove the fifth gear housing. 4. Remove the gears and the fifth gear synchronizer. 5. Remove the gearbox housing: Loosen the gearbox...
Gearbox assembly Note: Be sure to replace with new ones after each removal the seals, O-rings, clutch thrust bearing guide, gear retaining rings, cylindrical pins, bearing retaining rings, shift rod spring studs, clutch release cylinder...
Reverse switch Removal and installation the reverse switch Removal the reverse switch 1. Place the vehicle on a two-post lift. 2. Remove the front left wheel from the vehicle. 3. Remove the front left fender liner. 4. Loosen the...
Removal and installation the gear shift mechanism Removal the gear shift mechanism 1. Place the vehicle on a two-post lift. 2. Loosen the nut (1) of the gear shift drive rod. 3. Loosen the mounting bolts and remove the engine oil pan. 4. Remove the exhaust pipe. 5....
Gear shift shaft Removal and installation the gear shift shaft Removal the gear shift shaft 1. Remove the gearbox from the vehicle. 2. Place the gearbox on the assembly stand. 3. Remove the fifth gear housing (see the relevant section...
Replacing bearings in the gearbox housing Removal the gearbox housing bearing 1. Remove the gearbox from the vehicle. 2. Place the gearbox on the disassembly stand. 3. Remove the fifth gear housing (see the relevant section above). 4. Remove the synchronizer...
Replacing bearings in the clutch housing Removal the clutch housing bearing 1. Remove the gearbox. 2. Place the gearbox on the assembly stand. 3. Remove the fifth gear housing (see the relevant section above). 4. Remove the synchronizer and fifth gear gears....
Special tools and devices Name of tools and devices Catalogue number 8mm Square Gearbox Drain Plug Socket Mot. 1018 Engine support beam with multiple adjustments and rigging Mot. 1453 Screw bracket for crossbar Mot. 1453 Mot. 1453-01 Frameless...