Service manual

FAN GEARBOX (Cont’d)

Checking Backlash (Cont’d)

Put the fan nut (Item 1) [A] on the shaft and tighten snugly.

Install a locking pliers on the fan nut and support the

handle against the long housing [A].

Using a magnetic based dial indicator mounted on a

bench vise, touch the dial stem on the bolt (Item 1) [B].

Hold the locking pliers against the long housing and rotate

the pulley back and forth to read the dial gauge [B].

If the backlash is GREATER than 0.008 inch (0,203 mm),

do the following:

1. Remove a square shim(s) (if present) between the

two housings.

2. Remove a large shim(s) from the tapered end of the

short shaft and add a small shim(s) of the same

thickness between the bearing and the gear on the

screw end of the shaft.

If the backlash is LESS than 0.005 inch (0,127 mm) do the

following:

1. Add a square shim(s) between the two housings.

2. Remove a small shim(s) between the bearing and

the gear on the screw end of the short shaft and add

a large shim(s) of the same thickness between the

snap ring and the bearing on the tapered end of the

shaft.

P–02982

–7–28–

853, 853H Loader

Service Manual

P–02979