Thomas ProTough 300 Screener, Owner'S/Operator'S Manual

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51
4.4 150 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 190 ~ 210 lbs.
/ ft. (258 ~ 286 Nm.). (fig. S0022).
2. Check the oil level for the axle bear-
ings. Add SAE 90W, or 80W - 90, or 75W
90, hypoid gear oil as required (fig. S0061)
by removing the plug .
3. Check and adjust tire air pressure to 80
psi. (551 kPa).
4. Lubricate all grease fittings using a
good quality lithium based grease.
5. Check pintle hitch mounting bolts.
Torque to 188 lbs./ ft. (256Nm). (fig.
S0023).
6. Check the safety chains for damage.
Chains must have no modifications such as
welded on hooks etc. (fig. S0023).
7. Check the axle mounting bolts. Torque
to 188 lbs./ ft. (256Nm). (fig. S0024).
S0022
Plug / oil fill
S0061
S0023
S0024
Wheel nut tightening sequence
Safety chain and pintle hitch
Axle mount
Check the axle seals closely if axle
lubricant is low.
IMPORTANT
Check axle oil level
50
4.4 150 HOUR SERVICE
4.4G Hydraulic System
Change the hydraulic oil filter after the
first 50 hours of operation and every 150
hours thereafter. Check the oil level daily.
Replace the hydraulic oil and suction
screen element every 900 hours. See sec-
tion 4.7 for 900 hour service information.
Replace the hydraulic oil after major
repairs are made, such as gear pump or
motor failure, or if the oil has been contam-
inated by water or other contaminate.
To change the filter:
1. Shut off the engine.
2. Remove the filter using a filter wrench
(S0068).
3. Lubricate the new filter seal with system
oil (C2202). Install to the filter head.
Hand tighten 3/4 to 1 1/4 turns after the
seal has contacted the filter head. Use
only Thomas approved filters.
4. Start the engine and check for leaks
around the filter seal.
5. Stop the engine and check the oil level
(S0064. Replenish with 10W30 mini-
mum API classification SJ motor oil.
S0042
S0068
C2202
S0169
Hydraulic oil filter location
Hydraulic oil filter
Hydraulic fill
Hydraulic level
Lubricate
4. MAINTENANCE 4. MAINTENANCE