Service Manual

Mid-Size Walk Behind Service Manual 5 - 7
HYDRAULIC DRIVE SYSTEMS
6. If the machine is too aggressive or tends to jump
forward, the valve needs to be opened further.
7. If the machine is slow to respond, the valve needs
to be closed further.
8. Repeat “Test Procedure” to check for proper
operation. Re-adjust the by-pass valves until
proper performance is achieved.
Figure 77
m-5209
Neutral Adjustment (T-Bar Floating
Deck)
If wheels turn when control bar is in neutral, adjustment
is required.
1. Raise rear of the machine so wheels are off the
ground and support with jack stands.
2. Start engine and run for 5 minutes at 3/4 throttle,
to warm hydraulic fluid.
3. Move control bar rearward and forward then
release. If wheels rotate when control bar is in
neutral, adjustment is required.
4. Loosen top and bottom jam nuts at pump arm
neutral
adjustment sleeve (Figure 78).
5. Push down on pump arm until sleeve contacts
bottom nut (Figure 78). Wheel should now be
rotating slowly
in reverse.
6. Turn bottom nut up slowly, moving sleeve and
pump arm up, until wheel stops rotating (Figure
78).
7. Turn top nut
down against sleeve and tighten to lock
the adjustment (Figure 78).
8. Repeat step 3 above to check adjustment. Repeat
adjustment procedure if necessary.
9. Repeat on other wheel, if necessary.
Figure 78
m-5204
Handle and Control Rods (T-Bar
Floating Deck)
1. Align upper handle with upper mounting holes in
rear frame (Figure 79).
2. Secure each upper mounting hole with a flange
bolt (3/8 x 1 in. (26mm) and flange nut (Figure 79).
Torque bolts to 25 ft. lbs. (34 N-m).
(1) By-pass valve (2) Jam nut
CAUTION
Children or bystanders may be injured if they
move or attempt to operate the machine while it is
unattended.
Always remove the Ignition and chock or block
tires when leaving the machine unattended, even if
just for a few minutes.
(1) Top jam nut
(2) Sleeve
(3) Bottom jam nut
(4) Pump arm