30
Dealer Service
MAN1248 (2/26/2018)
Figure 21
. Motor Removal/Installation
Motor Installation
(See Figure 21)
1.
Verify the mating surfaces of spindle flange (8) and
motor (1) are clean. Apply RTV sealant to mating
surface of spindle flange (8).
2.
Carefully attach motor (1) to spindle flange (8),
keeping bypass ports to the left as shown. Use four
fasteners (2 & 3) and torque to 85 lbs-ft.
3.
Apply adapters (6) to front and rear of motor.
4.
Being prepared to address some spilled oil, attach
hoses (5 & 6) to rear and front of motor, tightening
JIC nuts to adapters (6).
5.
Use clamps to attach both tubes (5 & 6) to deck.
6.
Open valve at tank. Verify oil level is 5" above
bottom of dip stick.
7.
Review safety procedure for checking hydraulic
leaks and mower operation.
8.
Attach to tractor. Confirm proper cutting operation.
PUMP & MOTOR
SEAL AND GEAR REPLACEMENT
The pump and motor are designed to provide power to
the cutting deck. Lower cutting power can be traced to
worn items inside pump and motor. Be sure to perform
filter and strainer maintenance as directed. Elevated
operating temperatures (above 180 degrees F.) reduce
pump and motor seal life. For operating in highly
loaded conditions, consider fitting the unit with the
cooler option.
Seal inspection can be made once pump or motor is
removed from the cutter (see sections on pump or
motor replacement). Bench inspection of hydraulic
components is recommended.
During disassembly, look for signs of advanced deterio
-
ration of primary components. Consider replacing
pump or motor if such wear is determined. Replacing
components could exceed the cost of replacing pump
or motor.
Pump and Motor Primary Components
Signs of Damage
(See Figure 22)
1.
Scored or pitted sleeve bearings (7).
2.
Drive or driven gear (11 & 12) damage to teeth,
scored or pitted shafts or visible fractures.
3.
Broken or fractured front cover (5) or gear housing
(13) castings.
Figure 22
. Pump and Motor Wear
1.
Hydraulic motor
2.
1/2 NC Flanged lock nut
3.
1/2 NC x 2-1/2 HHCS, GR5
5.
Motor supply tube
6.
Adapter, 1" JICM x 1" ORBM
7.
Tube from motor
8.
Motor return tube
1.
Screw
2.
Ring
3.
Shaft seal
4.
Washer
5.
Front cover
6.
O-ring seal
7.
Sleeve bearing
8.
Back-up ring
9.
Seal
10. Thrust plate
11. Drive shaft
12. Driven gear
13. Gear housing
