Hand Pump (Emergency); Removal Of Hand Pump - Piper PA-31-350 Maintenance Manual

PIPER AIRCRAFT
T-1020
MAINTENANCE MANUAL
INSTALLATION OF HYDRAULIC PUMP.
1. Place a new gasket on the base of the housing.
2. Lubricate the pump shaft splines with Molybdenum Disulfide, Type "G", paste from lubricant.
3. Install the pump on the housing.
- NOTE -
When installing the pump, keep the drain fittingfacing to the lower
right in the downward position.
4. Line up the shaft splines with the gear inside the engine housing.
5. Install flat washers, and nuts on the base of the pump and tighten.
6. Install the two hydraulic hoses and prime the pump before completing the hookup to the firewall
fittings.
7. Check to be sure that the system reservoir contains the required amount of clean hydraulic fluid.
8. Change system fluid filters.
PRIMING HYDRAULIC PUMP.
The following instructions for priming the hydraulic pump assures that the pump will not be operated in a
dry condition and shall be followed whenever a pump is serviced or replaced.
I. Remove the hydraulic suction and pressure lines from the firewall fittings.
2. Install caps on suction and pressure fitting at the firewall to prevent the loss of fluid prior to the
hookup of the hydraulic lines.
3. Holding both lines at a level higher than the pump, pour hydraulic fluid. MIL-H-5606. into the line
4. Remove one cap at a time from the firewall fittings and connect the appropriate line to the fitting.
trying not to spill any of the hydraulic fluid previously put into the lines.
5. After the engine has been operated, check the hookup for leaks.
AUXILIARY.
HAND PUMP (EMERGENCY).
REMOVAL OF HAND PUMP.
1. Remove the pump access panel located aft of the control pedestal.
2. Disconnect the hydraulic pressure and suction lines from the forward end of the pump.
3. Remove the pump from its mounting bracket by removing attachment bolts.
4. Remove the pump from the airplane.
5. Cover the pressure and suction lines to prevent contamination.
DISASSEMBLY OF HAND PUMP. (Refer to Figure 29-16.)
1. To remove the plunger and component parts. remove quick click pin and the four screws allowing
the bracket to separate from the pump body.
29-21-02
Page 29-45
Issued: September 2, 1981
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