Toro Reelmaster 3100-D Service Manual page 158

Installing the Piston Pump/Hydrostat (continued)
Hydraulic System: Service and Repairs
A case drain exists in the piston pump/hydrostat and a suction port
is near the input shaft of the gear pump
pump is installed to the piston pump, make sure that plugs placed in
either of these ports are removed. Failure to remove plugs will cause
excessive pressure in the piston pump and damage seals. Also,
before installing gear pump to piston pump, fill piston pump housing
with clean hydraulic fluid through case drain hole.
3. Install and secure gear pump to the piston pump (see
5–88)).
4. Place key into piston pump shaft slot. Slide taper lock bushing onto the piston
pump shaft with bushing flange toward pump housing.
5. Make sure that tapered surfaces of pump pulley and taper lock bushing are
thoroughly clean (no oil, grease, dirt, rust, etc.).
6. Position pump pulley to taper lock bushing and align non−threaded holes of
pulley with threaded holes of bushing. Loosely install three (3) cap screws
with lock washers to bushing and pulley.
Support pump assembly during installation to prevent them from
falling and causing personal injury or component damage.
7. Position pump assembly to the machine. Install fasteners and spacers
securing the pump mount plate to the engine and pump support
Tighten fasteners securely.
8. Position and secure pump support to pump mount plate, piston pump and
engine mount with removed fasteners and spacers.
9. Install pump drive belt (see
10. Using a straight edge across the lower face of the pump pulley, verify pump
drive belt alignment across engine and pump pulleys. Slide pulley and taper
lock bushing on pump shaft so that drive belt and straight edge are aligned
indicating correct position of pump pulley. Secure taper lock bushing in
position with set screw.
When tightening taper lock bushing cap screws, tighten in three (3)
equal steps and in a circular pattern.
11. Secure taper lock bushing and pump pulley by tightening three (3) cap
screws to a torque from 10.2 to 13.6 N·m (90 to 120 in−lb) in three (3) equal
steps and in a circular pattern.
12. Check that pump drive belt alignment is still correct. If needed, loosen and
re−adjust pulley and taper lock bushing location on pump shaft to allow for
correct belt alignment.
IMPORTANT
CAUTION
Installing the Drive Belt (Figure 65) (page
IMPORTANT
Page 5–82
(Figure 69). Before the gear
Gear Pump (page
(Figure
Reelmaster ® 3100-D/3105-D
20252SL Rev A
68).
5–75)).