Gehl 503Z, Operator'S Manual, Page: 113 / 132

918070/FP0811 4-23 Printed in U.S.A.
a. Loosen jam nut (2) and rotate the adjustment
nut (3) until reaching the correct V-belt ten-
sion.
b. Tighten jam nut (2) and re-check V-belt ten-
sion. Close the engine cover when finished.
Figure 4-20 Checking & Adjusting Air Condi-
tioning V-belt Tension
Track System
Track Cleaning
If dirt or mud builds up in the track frame, raise the
track frame using the boom and dipper arm and then
rotate the elevated track to clean it. Be sure that the
build-up has been cleared from the track. Repeat for the
other track. See Figure 4-21.
Figure 4-21 Track Cleaning
Note: When using the boom and dipper arm to lift any
portion of the machine, roll the bucket until the round
base is against the ground. The angle of the arm to the
boom should be at 90º. See Figure 4-21.
Changing Final Drive Oil
1. Position the machine on a level surface with final
drive plugs positioned as shown in “Drain Posi-
tion,” Figure 4-22. Turn off the engine.
2. Open both plugs and drain oil into a suitable con-
tainer. Re-install plugs.
3. Start the engine and move the machine slightly
until plugs are positioned as shown in “Fill Posi-
tion,” Figure 4-22.
4. Shut off the engine. Remove the ignition key and
take it with you. Lock-out the controls by raising
left control console.
5. Remove both screw plugs. Pour fresh oil (Chevron
Delo Gear 80W-90 or BP Transgear 80W-90) into
the top hole until oil starts to run out of the bottom
hole.
6. Re-install both plugs securely.
approx. 11/32” (9mm)
3
1
2
2
3
Serial
Numbers
AH00578 and
before
Serial
Numbers
AH00579 and
up
IMPORTANT
Always dispose of oil according to local
regulations or take to a recycling center for
proper disposal. DO NOT pour fluids onto
the ground or down a drain.