Arconic 918 Series, Инструкция по эксплуатации

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17
918 series Powerig Hydraulic Units (HK786
)
Hydraulic Pumps
For parts identification, see Figures 8 & 9 on the
following pages.
The hydraulic pumps that are used on POWERIG
®
Hydraulic Unit
models
918-2
and
918-3
are similar, except for the covers. The
918-2 pump cover has
two
outlets; the 918-3 pump cover has
three
outlets.
For major overhaul, return pumps to the address shown on the
inside back cover of this manual. These pumps will be returned
to the manufacturer for overhaul and test, and will be returned
with a new warranty.
Minor servicing (clearing and replacing perishable and high-wear
components) can be done if replacement parts (shown in Figure
8) are available.
An extra pump for each POWERIG should be kept on hand.
TO REMOVE PUMP FOR OVERHAUL
For parts identification, see Figures 1, 2, 8, & 9.
1. Disconnect the electrical power supply from POWERIG and
remove the hood.
2. Disconnect the solenoid wires in the electrical panel or
remove the solenoids from the combination valves.
3. Disconnect the pressure hoses from the combination
valves.
4. Disconnect the return line hose.
5. Remove the six socket-head cap screws holding bracket and
combination valves. Lift bracket and valves, and set them
aside.
6. Loosen the pipe coupling in suction-line assembly. See
Figure 14, Item 6.
7. Remove two socket-head cap screws holding the pump to
the motor.
8. Support weight of pump and slide out of motor housing.
9. Pump to motor coupling (P/N
110572
) comes out with the
pump. Remove the coupling only if necessary.
10. Remove six socket-head cap screws (Figure 8, Item 7) to
remove the cover when replacing O-rings, seats, balls, or
springs. (If this is the only service being performed, omit
steps 5, 6, 7, 8, and 9).
11. Remove the six socket-head screws (Figure 8, Item 6)
to remove the barrel for replacement of O-ring, piston
assemblies, or springs. (If this is the only service being
performed, omit steps 5, 6, 7, 8, and 9).
12. A worn shaft seal can be removed using a pointed rod.
13. Use the Pump Seal Kit listed in
Kits & Accessories
.
14. Smear LUBRIPLATE
®
130-AA (Huck P/N
502723
), or
hydraulic fluid, on O-rings when reassembling.
15. Tighten socket-head screws (Figure 8, Items 6 & 7) to 30–35
ft.-lbs. torque.
16. If pump to motor coupling was removed, reassemble with
coupling positioned 5/16" - 3/8" from pump flange.
17. Reassemble pump to motor. Tighten two socket-head
screws to 90 ft.-lbs. torque if plated and 120 ft.-lbs. if un-
plated.
18. Reassemble solenoids, pressure hoses, return hose, and
suction line. Use Threadmate
®
thread compound (P/N
508517
) on pipe threads of fittings and hoses.
LUBRIPLATE is a registered trademark of Fiske Brothers Refining Co.
Threadmate is a registered trademark of Parker Intangibles LLC..
CAUTION: Pumps must be primed after
overhaul. See First-time Start-up. Check
output pressures. See C
heCking
& A
djusting
O
utput
p
ressures
.