Jackshaft Replacement - HUSTLER Super S General Service Manual

The following procedures should be performed with the
vehicle drive wheels off the ground, then repeated under
normal operating conditions.
Potential for serious injury! Never work under the
machine or attachment unless it is safely
supported with jack stands. To prevent possible
injury to the servicing technician and/or bystanders,
insure the vehicle is properly secured.
• Make certain machine is secure when it is
raised and placed on the jack stands.
• Use only certified jack stands. Use only
appropriate jack stands, with a minimum
weight rating of 2000 pounds (907 kg) to
block the unit up.
• Use in pairs only.
• Follow the instructions supplied with the
jack stands.
• The jack stands should not allow the
machine to move when the engine is running
and the drive wheels are rotating.
• Do not allow the wheels to come in contact
with the floor or any object that would permit
the unit to propel itself.
• To prevent injury stay clear and exercise
caution when rotating the wheels.
1. With the bypass valve open and the engine running,
slowly move the directional control in both forward
and reverse directions (5 or 6 times), as air is purged
from the unit, the oil level will drop.
2. With the bypass valve closed and the engine running,
slowly move the directional control in both forward
and reverse directions (5 or 6 times). Check the oil
level and add oil as required after stopping the engine.
3. It may be necessary to repeat Steps 1 and 2 until all
the air is completely purged from the system. When
the pumps operate smoothly forward and reverse at
normal speeds, purging is complete.
REV A

Jackshaft Replacement

The following procedures should be performed when
replacing the jackshaft assembly or the attached hydraulic
pump. Refer to Figure 4-23.
1. Place the yellow spider gear (H) in the cavity of the
jackshaft assembly (J) so that it lies flat on the bottom
of the cavity. Make sure the gear teeth are between the
lugs in the jackshaft assembly (J).
2. Coat the inside diameter (F) of the pumpside coupling
(G) with a minimal amount of anti-seize. Place the
pumpside coupling (G) over the spider gear (H) so that
the lugs engage with the lugs inside the jackshaft
assembly (J).
NOTE: Before assembling the hydraulic pump (B) to the
jackshaft assembly (J), make sure both the pump and
jackshaft assembly contacting surfaces (N) are free of
debris.
3. Place the jackshaft gasket (I) in position making sure
it is aligned and seated correctly.
4. Leaving the pumpside coupling (G) as placed, insert
the hydraulic pump shaft, with the key (D) in the shaft
keyway, into the pumpside coupling (G). Make sure to
align the key (D) with the keyway in the coupling.
5. Attach the hydraulic pump (B) and jackshaft assembly
(J) together as shown. Torque the cap screws (C) to
30–32 ft-lbs (40.67–43.38 N•m).
6. Rotate the pump shaft, using the pump's fan blades
(A), until a set screw hole (P) in the pumpside coupling
(G), is visible through the hole (O) in the side of the
jackshaft assembly (J). Install a set screw (E) in the
hole, and tighten it to 96–108 in-lbs (10.84–12.20
N•m).
Rotate the pump shaft again until the other set screw
hole (P) is visible. Install and tighten the set screw (E)
to 96–108 in-lbs (10.84–12.20 N•m).
7. Install the vent fittings (K & L) as shown and tighten.
8. Insert the nylon tube (M) into the fitting (L) as shown.
Make sure it goes through the hole in the engine plate.
4-12 127180