10-90. HEATER CONTROL CABLE AND SHUTOFF VALVE ADJUSTMENT
This task covers:
Adjustment
Adjustment
1.
Push heater control knob (18) to “OFF’’ position.
WARNING
Ensure engine is cool prior to performing this procedure. Steam or
hot coolant under pressure can cause injury to personnel.
2.
Loosen two clamps (3) on hoses (4).
3.
Rotate heater shutoff valve (1) and position heater shutoff valve lever (5) in the upward position.
4.
Tighten two clamps (3) on hoses (4).
5.
Loosen screw (14) and clip (13) and remove cable assembly (2) from heater shutoff valve (1).
6.
Remove screw (8), washer (9), clamp (10), and crankcase depression regulator valve (11) from
mounting bracket (12).
7.
Install crankcase depression regulator valve (11) on mounting bracket (12) with screw (8) and washer (9).
8.
Cut loop end (6) from spring wire (7). Cut as close to loop end (6) as possible.
9.
Remove spring wire (7) from steel casing (16) and tube (15) by pulling heater control knob (18).
Remove any kinks in spring wire (7).
NOTE
If control cable is 47.5 in. (1207 mm) in length, perform step 10.
10.
Remove a 5 in. (127.0 mm) section from steel casing (16).
11.
Route steel casing (16) through clamp (20).
12.
Install spring wire (7) into steel casing (16) and tube (15).
13.
Position end of steel casing (16) 0.75 in. (19.0 mm) from clip (13) and install steel casing (16) on
heater shutoff valve (1) with clip (13) and screw (14).
14.
Position heater control knob (18) 0.125 in. (3.18 mm) from instrument panel (17).
15.
Turn spring wire (7) three turns around heater shutoff valve pin (21). Cut off any excess spring wire (7).
16.
Pull out heater control knob (18) to “ON” position.
17.
Apply lubricating oil to heater shutoff valve lever (5) and shutoff valve pin (21).
18.
Apply lubricating oil to plunger (19).
19.
Move heater control knob (18) to “OFF” and “ON” several times to distribute oil.
20.
Check engine coolant level (TM 9-2320-280-10).
21.
Start engine (TM 9-2320-280-10) and check heater shutoff valve (1) connections for leaks.
NOTE
Perform the following procedure if the heater temperature control
assembly is difficult to operate. The repositioning of the heater
temperature control cable and heater shutoff valve will reduce
cable bends and allow access for lubrication.
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Materials/Parts
Lubricating oil (Appendix C, Item 32)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
General Safety Instructions
Ensure engine is cool prior to performing this
procedure.
TM 9-2320-280-20-3
10-150
Change 1
