TM-9-2320-361-34

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

MAY 1992

TM-9-2320-361-34 - Page 647 of 764

TM 9-2320-361-34

17-2. ENGINE COOlANT HEATER FLAME DETECTOR SWITCH MAINTENANCE

(Contd)

d. Assembly

1.

2.

3.

4.

5.

6.

Install nut (7) and new sleeve (8) on probe (9).

Install switch bracket (13) on mount (6) with split roll pin (10).

Install microswitch (1) on switch bracket (13) with two screws (12) and nut-assembled lock-

washers (2).

CAUTION

Ceramic rod is very brittle and is easily broken; handle carefully.

Tilt microswitch (1) and switch bracket (13) back on mount (6) and insert ceramic rod (11) into

probe (9).

Rotate microswitch (1) back on mount (6) and install spring (5), washer (4), and adjusting screw (3)

on switch bracket (13) and mount (6).

Tighten adjusting screw (3) until microswitch (1) clicks. Then continue 3/4 turn past click point.

I

e. Installation

I

1.

Install flame detector switch (22) on heater housing (21) and tighten nut (7).

2. Install six leads (24) on flame detector switch (22) with five screw-assembled lockwashers (23).

3. Install air tube (17), elbows (14) and (18) and ground lead (16) on heater housing (21) with nut-

assembled lockwasher (15).

4. Install guard (20) on heater housing (21) with four screws (19).

17-4