Grasshopper 600 Series - Adjustments and Troubleshooting; Loss of Power in the Hydrostatic Tramsmission; No Positive Neutral Postion; Neutral Adjustment

ADJUSTMENTS AND TROUBLESHOOTING
A. CAUTION
Never make adjustments with the
engine running.
LOSS OF POWER IN THE
HYDROSTATIC TRANSMISSION
Check the fluid level and make sure the proper
amount of fluid is in the reservoir. The cooling
fins and fan blades should be clean and free of
foreign matter. Check the spring tension of the
drive belt (refer to page 19)
NO POSITIVE NEUTRAL POSITION
If drive wheels travel forward or backward when
the steering lever is in swing-out position (neu-
tral), adjustment is required.
NEUTRAL ADJUSTMENT
(Refer to illustration page 29)
1. Block up under tractor frame so both drive
wheels are off the ground.
2. Make sure parking brake is released.
3. Remove linkage rod (item 44) from trans-
mission control arm (item 23).
4. Place steering levers in the neutral swing-out
position and start engine.
5. If either of the drive wheels turn, proceed
with the following adjustment.
6. Loosen locking nut (item 26) and rotate
pivot bolt (item 25) until neutral is achieved.
Tighten locking nut.
NOTE: Pivot bolt roller is mounted off center
and works as an eccentric when the bolt is
turned.
7. Repeat procedure for other side transmission.
8. Reinstall linkage rod in control arm. If ball
stud docs not reinstall into control arm with-
out moving the control arm, adjust length of
linkage rod until it does to assure neutral ad-
justment will be maintained when linkage is
connected.
9. Test drive machine for straight line travel
with both levers full forward. If travel is not in
a straight linc, adjust the stccring lever
stop on the side that is the fastest 1.e.: if ma-
chine goes to the left, adjust the right
steering stop to slow down the right trans-
mission until travel is straight ahcad.
HYDROSTATIC TRANSMISSION
REMOVAL
NOTE: Transmission removal procedure is the
same for both transmissions.
1. Remove ignition key. Place tractor on stands
and remove fender and drive wheel.
2, Loosen right idler (item 32, page 27).
3. Unhook idler spring (item 54, page 27) from
idler arm.
4, Remove nylon fan (item 44, page 27) from
transmission and remove the drive belt.
5. Remove external retainer (item 50, page 29)
and damper (item 47 or 48, page 29) from
control arm.
6. Disconnect the stccring linkage from control
arm (item 23, page 29) on transmission.
7, Disconnect brake linkage pins (item 3, page
29) and brake linkage rod (item 5, page 29).
Loosen brake pivot mount (item 2, page 29)
and remove brake pivot tube (item 1, page 29).
8. Remove the two bolts from the PTO shaft
front bearing (item 3, page 30). Now remove
the PTO shaft and swing out of the way
when removing the transmission.
9, Drain hydraulic fluid from transmission.
Remove hydraulic hoses from transmission.
On the right transmission remove the fluid fil-
ter.
10. Remove nine bolts (cight .25" [item 18, page
27] and one .312" [item 59, page 27]) that
mount transmission to inner mount. Support
transmission and remove two bolts from
transmission final drive to frame and lowcr
the transmission unit out of the frame.
To remove wheel hub assembly (item 11, page
27), use hub puller kit (part number 609008) to
pull hub from axle. Do not use a gear puller that