4.8 TOOTH CONTACT FOR UPPER BEVEL GEARS AND FINAL DRIVE BEVEL GEARS 1
2
6
TRANSMI SSION HST
5
REAR HSTAXLE
7
A/C AND INDEX HEATER
HYDRAULIC ELECTRIC & DIAGNOSIS SYSTEM
HYDRAULIC STEERING SYSTEM
STEERING SYSTEM FRONT AXLE
FRONT BRAKE AXLE
REAR BRAKE AXLE
3
4
REMARK •
The engaging efficiency of the teeth is judged by the contact area since the backlash of the upper and lower bevel gears cannot be measured. In general, the backlash is within the standard range if the contact area is within the specified value since the contact condition is considered when determining the initial standard backlash.
1. Lift the front axle using a hydraulic jack or a hoist, remove the front tires and drain oil from the axle completely. 2. Remove the 16 bevel gear (1) and 11 bevel gear (2) refering to the section "Servicing" in this chapter. Then, remove any oil on the teeth. 3. Coat all the teeth of the 11 gear with contact grease and reassemble it. 4. Remove the axle cover (3) and clean the teeth of the 42 bevel gear (4) and 9 bevel gear (5). 5. 5. Coat all the teeth of the 9 bevel gear (5) with contact grease. 6. 6. Reassemble the axle cover (3) and rotate the axle using a hand to check any defect.
9-14 238 of 450
R69W915A
7. Check that the front axle is firmly supported. Then, start the engine to rotate the front axle for approx. 10 turns. 8. Stop the engine and disassembly the bevel gears to check the teeth engagement. 9. If the contact area is abnormal, adjust the shims (6, 7 and 8 in the figure) and measure the contact area again. • Size of shims Upper bevel shim (6): 0.8, 1.0, 1.2 (standard shim: 1.0 mm) Lower bevel shim (7): 1.4, 1.6, 1.8 (standard shim: 1.6 mm) Refer to section 4.7 for measuring method.
REMARK • •
Bevel gear backlash: 0.15 ~ 0.35 mm To o t h c o n t a c t c h e c k : A t t h r e e equally divided positions in the circle circumference, the contact area should be over 35% of the teeth area and the center of the contact mark should be one third to half of the entire length.
DR72-W00
Dealer Copy -- Not for Resale
TRANSMI SSION TRANSMISSION
CLUTCH
ENGINE
GENERAL
SAFETY FIRST
FRONT AXLE - MEASUREMENT AND ADJUSTMENT
