Service Manual

HYDRAULIC DRIVE SYSTEMS
5 - 28 Mid-Size Walk Behind Service Manual
6. Mark the fittings to prevent reversing them when
they are reinstalled. Hold the pump fitting
stationary while removing the hose fittings from
the pump. Cap the fittings to prevent dirt from
entering the system (Figure 120).
Figure 120
0602-51
Note: Fuel tank removed for clarity.
7. Remove the return line from the 90° fitting located
on the side of the pump (Figure 121).
Figure 121
0602-49
8. To remove the supply line, slide the hose clamp at
least 2” (50mm) down the supply hose to clear the
barbed fitting (Figure 121). Pull the hose off the
fitting and cap both the supply hose and fitting.
9. Use a 5/16 8 point socket to loosen the set screw
on the control linkage. Remove the pump
mounting bolts and slide the control shaft out of
the linkage (Figure 122).
Figure 122
0602-21
10. To replace the pump, reverse the above steps.
11. Reconnect the return and supply lines to the
reservoir and refill with fresh oil until the level is
1/4” (6mm) below the top baffle (Figure 123).
Figure 123
m-4280
(A) Return line (B) Supply line
B
A
(1) Cap
(2) Baffle
(3) Fluid level - full