Receiver-Dehydrator Removal; Receiver-Dehydrator Installation - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
7. The open position should be adjusted to 2.90 ±. 10 from the top of the bulkhead at station 121.0
to the underside of the lip on the air scoop, by adjusting the actuating screw at the upper limit switch. Lock the
jam nut after adjustment is set.
8. Cycle the scoop by turning the air conditioner rocker switch on and off to insure proper
operation.
b. The landing gear safety switch used to activate the condenser air scoop is located on the right main
gear upper torque link, is adjusted so that the switch is actuated in the last .250 ±. 125 inch of oleo extension.
1. Place airplane on jacks. (Refer to Jacking, Section II.)
2. Compress the strut until nine inches is obtained between the top of the gear fork and the
bottom of the gear housing. Hold the gear at this measurement.
3. Adjust the switch down until it actuates at this point. Secure the switch.
4. Extend and then compress the strut to ascertain that the switch will actuate in the last
.250 ± .125 inch of oleo extension.
5. Remove airplane from jacks.
6. Refer to Chapter 7 for left gear safety switch information.
14-116. RECEIVER-DEHYDRATOR. (Refer to Figures 14-38 and 14-42.)
14-117. RECEIVER-DEHYDRATOR REMOVAL. This unit is mounted on the inboard bulkhead in the
right main gear wheel well.
a. Discharge the system of all refrigerant.
b. Disconnect the refrigerant lines at the receiver-dehydrator. Cap the end of the lines to prevent
contamination of the system.
c. Loosen the clamps and remove the receiver-dehydrator from its mounting bracket.
NOTE
This part is not serviceable, it must be replaced with a new part.
14-118. RECEIVER-DEHYDRATOR INSTALLATION.
a.
Mount the new receiver in the mounting bracket with the sight glass up. Position the clamps so
that the wormgear housings are in line with the aft fitting of the receiver.
b.
Install new O-rings on the line fittings and lubricate the O-rings with refrigerant oil.
c. Connect the refrigerant lines to the dehydrator.
CAUTION
Torque the fittings. (Refer to Table XIV-X.)
d.
Evacuate and recharge the system in accordance with paragraph 14-101 or 14-102.
Reissued: 9/23/80
ACCESSORIES AND UTILITIES
4H13