Thomas PROTOUGH 900 - 4.6 900 Hour Service

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4. MAINTENANCE
4.4 50 HOUR SERVICE
4.4H Chassis Maintenance
1. Check the wheel nut torque. Use the
correct tightening sequence and tighten in 3
increasing torque settings to 500 ~ 550
ft./lbs. (680 ~ 748 Nm.). (fig. T90083).
2. Check the oil level for the axle bear-
ings. Add SAE 90 Hypoid Gear (Hypoid
Rear Axle Oil), 80W-90, or 75W-90 oil as
required (fig. T90024) by removing the
plug.
3. Check and adjust tire air pressure to
120 PSI (830 kPa).
4. Lubricate all grease fittings using a
good quality lithium based grease.
Check the axle seals closely if axle
lubricant is low.
IMPORTANT
T90024
Plug / oil fill
Check axle oil level
T90083
Wheel nut tightening sequence