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TM-9-2330-380-14-P Semitrailer Van: Electronic Tactical 12-Ton 4-Wheel XM1063 (NSN 2330-01-224-9244) and M129A4 (NSN 2330-01-372-5642) Manual

Hub and Drum Assembly (XM1063 Only)

TM 9-2330-380-14&P

4-51. Slack Adjuster (M129A4 Only) (cont'd)

e . Adjustment

NOTE

M129A4 slack adjusters are self-adjusting. Use this procedure when installing new slack adjusters or

when slack adjusters have been disconnected.

Fabricate clevis installation gage using template in Appendix G.

1. Place clevis installation gage (11) so it fits over pin body in air

chamber shaft (8).

2. If slack adjuster is properly adjusted, a pencil can be placed

into the center of the air chamber shaft and 6.0 hole in gage.

NOTE

If measurement is more than 6.0, move inner nut up air

chamber shaft. If measurement is less than 6.0, move inner

nut down air chamber shaft.

3. If proper measurement is not present, remove slack adjuster

and adjust inner nut as required.

4. Lubricate in accordance with Appendix I, Lubrication

Instructions.

WARNING

Ensure brake drum moves freely after completing step 5 (backing off adjusting screw (4) 3/4 turn).

Brake drum should move freely. Failure to do so could result in damage to equipment and serious

injury to personnel.

5. Turn adjusting screw (4) clockwise until brake drum does not move. Back off adjusting screw (4) 3/4

turn. Brake drum should move freely.

Follow-on maintenance:

Install dust cover.

Uncage brakes (para. 2-27).

4-90