SkyTrak 3606 Service Manual User Manual
Page 212
Section 9
9-18
12. Lubricate the gear set (
) with clean hydraulic oil
from a filtered source. Slide the gear set into position
within the SEC housing (
). Avoid damaging the lip
seal (
) when the driven gear passes through the
housing. Apply additional oil to the gears after
installation.
13. Install the other thrust plate (with channel and with
backup seals) over the gears so that the groove in the
thrust plate will face away from the gear housing (
).
The flat side of the seal should face up with the relief
groove facing the outlet side of the housing.
14. Place the gear housing (
) over the gear set. Align
the pump housings according to the alignment mark
made during disassembly. Insert the dowel pins (
) in
the gear housing into the holes in the SEC housing
(
). DO NOT pinch the square “R” seal (
). Gently
tap the gear housing around the edges with a soft
hammer as needed to further engage the dowels and
to bring the housings together for final seating.
15. Place the PEC housing (
) over the gear set. Align
the pump housings according to the alignment mark
made during disassembly. Insert the dowel pins (
) in
the PEC housing with the holes in the gear housing
(
). DO NOT pinch the square “R” seal (
). Gently
tap the PEC housing in the center with a soft hammer
as needed to further engage the dowels and to bring
the housings together for final seating.
16. Install the four capscrews (
, Fig. 9– 11) and washers
) that secure the pump housings (
and
)
together. Tighten the capscrews in a criss-cross
pattern to evenly draw the housing sections together.
Rotate the drive shaft to verify that there is no binding
within the pump. After the capscrews are tight and
there is no internal binding, torque the capscrews to
specification in a criss-cross pattern. Refer to the
torque specification chart in Section 2 General
Information, Specifications and Maintenance
Instructions.
h. Pump Installation
1. Place the pump (
), Fig. 9– 6 and a new gasket (
3
)
into position on the transmission. Align the pump
gear shaft with the internal transmission gear so that
the machined teeth mesh together.
2. Align the gasket bolt holes with the pump mount
holes. Secure the pump to the transmission with two
plain 1/2" washers (
), 1/2" lockwashers (
) and
1/2-13 x 1-1/2" hex-head capscrews (
). Torque the
capscrews to 75 lb/ft (102 Nm).
3. If necessary, slide the T-bolt band clamp (
4
) onto the
pump inlet hose (
). Secure the hose to the inlet tube
assembly (item 8, P/C 6.11) with the T-bolt band
clamp.
4. Thread the outlet hose (6) onto the connector (16).
5. Prime the pump by filling the pump inlet opening with
fresh, filtered hydraulic oil before attaching the inlet
hose (5).
6. Place a new 1-1/2" SF O-ring (15) into position over
the opening and secure the 1-1/2" I.D. x 19" long inlet
hose (5) with two 1-1/2" flange halves (10), four 1/2"
lockwashers (21) and four 3/8-16 x 1-1/4" hex-head
capscrews (23). Torque the capscrews to 31 lb/ft
(42 Nm).
7. Check all routing of hoses, wiring and tubing for
sharp bends or interference with any rotating
members. All tube and hose clamps must be tight.
8. Start the engine and run at approximately one-third
to one-half throttle for about one minute without
moving the vehicle or operating any hydraulic
functions.
9. Inspect for leaks and check all fluid levels. The
hydraulic reservoir oil level must be visible in the sight
gage.
Note: Check for leaks and repair as required before con-
tinuing.
i.
Pump Pressure Check Test
Attach a 500 psi (34,5 bar) gauge to the unloader valve
inlet port. Monitor the pump pressure at the unloader
valve. It must exceed 200 psi (13,8 bar) within moments
after starting the engine. Failure to achieve this pressure
means that the pump is not properly functioning.
Checking pump stand-by pressure
Connect a 1000 psi (69 bar) pressure gage to the pres-
sure tap on the inlet of the main control valve center sec-
tion.
Start the engine and run at idle. DO NOT operate any
functions for at least one minute. Record the system
standby pressure while still at idle. It must be 250/350 psi
(17,25/24,15 bar).
WARNING: Avoid prolonged engine operation
in closed areas with inadequate ventilation.
Failure to properly ventilate exhaust fumes can
result in death or severe personal injury.
WARNING: Escaping hydraulic fluid under
pressure can penetrate the skin, causing seri-
ous injury. Relieve hydraulic pressure before
servicing any hydraulic component.
Model 3606 • Origin 10/99