Service manual

Groundsmaster 3280−D/3320 Page 7 − 11 Chassis
Removal (Fig. 4)
1. Park machine on a level surface, lower cutting deck
(or implement), stop engine, engage parking brake and
remove key from the ignition switch.
NOTE: To ease reassembly, tag hydraulic hoses to
show their correct position on the steering cylinder.
2. Disconnect the hydraulic hoses from the steering
cylinder. Put caps or plugs on all fittings and hoses to
prevent contamination.
3. Remove the lock nut (item 23) that secures the end
of the axle pivot pin (item 29) to the rear frame.
4. Jack up the machine (just ahead of the rear wheels)
until pressure is taken off the axle pivot pin. Support the
machine with jack stands to prevent it from falling.
5. Remove lock nut (item 26), cap screw (item 28) and
flat washer (item 27) that secure pivot pin to rear frame.
NOTE: Several washers (items 17, 24 and 25) are
installed between the axle pivot tube and rear frame to
adjust clearance between axle pivot tube and rear
frame. Before removing axle pivot pin, note location of
washers.
6. Pull the axle pivot pin out. This will release the rear
axle and washer(s) from the frame. Carefully pull the en-
tire axle and wheel assembly out from under the ma-
chine.
7. Locate and retrieve thrust washers (items 17 and 24)
and shim washer(s) (item 25).
Installation (Fig. 4)
1. Thoroughly clean the rear axle pivot pin. Inspect the
pin for wear or damage and replace if necessary.
2. Position the axle to the rear frame. Install small ID
thrust washer (item 17) in front of axle tube and large ID
thrust washer (item 24) directly behind axle tube. Place
shim washer(s) (item 25) as required between large ID
thrust washer and rear frame to allow .030” to .090” (.8
to 2.3 mm) axle tube end play. Slide pivot pin through
rear frame, washers and axle.
3. Secure pivot pin to rear frame with cap screw (item
28), flat washer (item 27) and lock nut (item 26).
4. Tighten lock nut (item 23) until shoulder of pivot pin
bottoms against the rear frame. Make sure that axle can
still pivot freely after lock nut is tightened.
5. Remove the jackstands and lower the machine to the
ground.
6. Install the hydraulic hoses to the steering cylinder.
7. Check oil level in hydraulic reservoir (front axle) (see
Traction Unit Operator’s Manual).
8. Lubricate the rear axle pivot bushings through the
grease fitting on the axle pivot tube (see Traction Unit
Operator’s Manual).
9. Operate machine and check steering cylinder hy-
draulic connections for leaks.
Chassis