SkyTrak 3606 Service Manual - Manual (Page 208)

Section 9
9-14
9.7.3 Pump Replacement
a. Pump Removal
1. Park the vehicle on a firm, level surface, fully retract
all hydraulic cylinders, ground the attachment (if any),
place the travel select lever in NEUTRAL (N), engage
the park brake switch and shut the engine OFF.
2. Unlatch, unlock and open the engine cover. Allow the
hydraulic fluid to cool.
3. Remove the four 3/8-16 x 1-1/4" hex-head capscrews
(23, Fig. 9–6) and 1/2" lockwashers (21) securing the
1-1/2" flange halves (10) to the pump (1). Remove
the inlet hose (5) and SF O-ring (15).
Note: It is not necessary to remove the T-bolt band
clamp (4) and inlet hose (5) from the inlet tube assembly.
4. Disconnect the outlet hose (6) from the connector
(16). Cap the outlet hose to prevent unnecessary
fluid spillage.
5. Remove both 1/2-13 x 1-1/2" hex-head capscrews
(23), 1/2" lockwashers (21) and 1/2" plain washers
(18) securing the pump (1) to the transmission.
Remove the pump and gasket (3) from the vehicle.
Wipe up hydraulic oil spillage.
b. Tools Required for Pump Repair
The following tools are required for servicing the pump:
1. A bushing puller made from Collet #33863 of Blind
Hole Puller Set 981 by Owatonna ® Tool Company or
an equivalent puller from another supplier. Modify the
collet as shown in Fig. 9–7.
Figure 9–7. Bushing puller.
2. A seal removal tool made by heating the tip of a
quality forged screwdriver and bending it as shown in
Fig. 9–8. Grind off the tip to fit the notch behind the
main pump shaft seal.
Figure 9–8. Seal removal tool.
3. A bushing installation tool made from A.I.S.I. 8620
heat-treated, bearing-quality steel, as indicated in
Fig. 9–9.
Figure 9–9. Bushing installation tool dimensions.
4. A special steel sleeve made from round steel bar
stock, 1-1/4" to 1-1/2" (31,75 to 38,1mm) in diameter
by 4-5/8" (117,5mm) as shown in Fig. 9–10. This
sleeve is used to insert the drive shaft through the lip
seal without causing damage.
WARNING: Hot hydraulic fluid can cause
severe burns. Wait for hydraulic fluid to cool
before servicing any hydraulic component.
WARNING: Escaping hydraulic fluid under
pressure can penetrate the skin, causing seri-
ous injury. Relieve hydraulic pressure before
servicing any hydraulic component.
0.015" R. MAXIMUM
C
B A
A 0.980/0.970"
B 0.875/(REF)"
C 0.100/0.090"
MA0791
1/4 INCH
MA0801
C
D
3.00 "
1.47 "
0.06 " 0.06 "
GRIND RELIEF ALLOWABLE
30
30
32
C 1.054 PLUS 0.000, MINUS 0.002"
D 1.250" DIAMETER
MA0811
Model 3606 • Origin 10/99