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DRIVE BELT
Adjusting the Drive Belt
See the Service Schedule Page 1–1 for the service
interval.
To adjust the drive belt between the engine flywheel and
the hydrostatic pump pulley, use the following procedure:
Raise the operator cab. (See Page 1–1.)
Remove the belt shield. (See Page 3–62.)
Use the following tools to check the belt tension:
MEL1404 – Bar
MEL1406 – Spring Scale
1. Install the tool on the drive belt. The pin (Item 1) [A]
must be pulled tight against the engine drive pulley.
2. Make a mark (Item 2) [A] on the cast flange just
above the tool handle.
3. Install the spring scale on the tool handle. The line
of pull (Item 3) [A] on the spring scale must be at
approximately 90° from the tool handle.
4. Loosen bolt (Item 4) [A] and jam nut (Item 5) [A].
5. Tighten adjustment nut (Item 6) [A] to increase belt
tension; loosen to decrease belt tension.
6. Tighten bolt (Item 4) [A] and jam nut (Item 5) [A].
NEW BELT: (less than .5 hours use): With 14 lbs. (62 N)
for force, the tool should move 1.25 inches (32 mm) (the
width of the tool handle). Run the engine approximately
5 minutes and readjust the tension.
USED BELT: (more than .5 hours use): With 12 lbs. (52
N) of force, the tool should move 1.25 inches (32 mm) (the
width of the tool handle).
Always readjust if a tension check results in a reading of
less than 10 lbs. (44N) of force.
A
1
1.25 inch (32 mm)
3
90 o
2
5
6
4
P–04927
B–13459
853, 853H BICS Loader
–3–63– Service Manual