Installation Of Hydraulic Pump; Gear Back-Up Extender Actuator Assembly; Removal Of Gear Back-Up Extender Actuator Assembly - Piper Lance II Service Manual

8. Connect green lead to positive terminal of power supply. Pump should operate
in reverse, dropping reading on high-pressure gauge to zero. The low pressure gauge should
indicate 500 to 800 psi. Disconnect green lead. Both pressure gages should indicate zero psi.
9. Should it be necessary to check the pump motor, first connect the ammeter in
the electrical circuit with the positive terminal of the meter to the black lead and negative
terminal of the meter to the negative terminal of the DC power supply.
10. Connect the blue lead from the pump motor to the positive terminal of the
power supply. With a high pressure indication on the pressure gauge, the ammeter should
read 75 amperes maximum. Disconnect the blue lead.
11. Connect the green lead from the pump motor to the positive terminal of the
power supply. With low pressure indication within the 500 to 800 psi range, the ammeter
should read between 15 to 35 amperes.
NOTE
In the event any of the various tests do not perform
satisfactorily, the pump assembly should be replaced.
12. Disconnect the-green lead from the power supply and permit the pressure to
drop before disconnecting the hydraulic lines.
6-10. INSTALLATION OF HYDRAULIC PUMP. (Refer to Figure 6-3.)
a. Insert grommet (22) in pump base mounting hole.
b. Insert bushing (20) in grommet (22).
c. Place washer (21) over bolt (19) and insert bolt through grommet (22) and bushing
(20) and pump base (16).
d. Place washer (23) and bushing (24) over bolt (19) and secure to mounting shelf (25).
e. Connect hydraulic Lines to pump.
f.
Connect pump electrical leads. Blue wire to gear up solenoid, green wire to gear
down solenoid, and black wire to ground.
g. Check fluid level in pump. Refer to Section II for filling instructions.
h. With airplane on jacks, operate pump to purge hydraulic system of air, and check for
leaks. After operation, recheck fluid level.
6-11. GEAR BACK-UP EXTENDER ACTUATOR ASSEMBLY.
6-12. REMOVAL OF GEAR BACK-UP EXTENDER ACTUATOR ASSEMBLY. (Refer to
Figure 6-6.) The back-up extender actuator is located under the center seat floorboard. To
reach the actuator, remove the center seats and floorboard.
a. Disconnect the actuator electrical leads at the quick disconnect terminals.
b. Disconnect the manual override control rod (30) at the actuator control arm (19) by
removing cotter pin, washers, and clevis pin (1).
c. Disconnect the pressure (13) and static (11) hoses from the elbows (12) of the
diaphragm housing (10) by releasing clamps and sliding the hoses from their elbows. The
hoses should be tagged for ease of reassembly.
d. Place a shop cloth under the actuator hydraulic valve (25) to absorb fluid, and then
disconnect the hydraulic tubes (26, 39, 40 and 41) from cross (38) and tee (46). Cover open
tubes and fittings to prevent contamination.
Revised: 9/2/78
HYDRAULIC SYSTEM
111
LANCE II SERVICE MANUAL