TM-9-2330-335-14-P

SEMITRAILER, TACTICAL, BREAKBULK/CONTAINER TRANSPORTER, 22-1/2 TON, RESET M871R, M871A1R AND M871A2R

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE MANUAL (INCLUDES REPAIR PARTS AND SPECIAL TOOLS LIST)

SEPTEMBER 2008

TM-9-2330-335-14-P - Page 551 of 640

0096-9

TM 9-2330-335-14&P

0096

COMBINATION SPRING BRAKE INSTALLATION INSTRUCTIONS - CONTINUED

NOTE

•

Setup stroke is only to establish push rod length.

•

For a typical Type 30 spring brake, if dimension “B” (Figure 9) = 5.0 in., setup stroke = 1-1/2 in.

(Table 3). The push rod length from mounting face to centerline of main clevis pin should measure:

5 minus 1-1/2 = 3-1/2 in. with the spring brake caged (Figure 10).

6.

Before marking push rod to be cut on new unit, be sure the spring chamber is caged and the push rod is fully retracted to

the zero stroke position. Refer to

Mechanical Release of Spring Brake (Gold Seal)

in this work package.

NOTE

When determining the push rod cut-off length, the length of the threaded rod protruding between

the clevis legs must not exceed 3/16 in. to insure no interface with the operation of the stack

adjuster (Figure 7).

7.

Thread clevis jam nut past the mark on push rod. Align bottom edge of nut with mark to use as a guide for cutting. Use a

sharp hack-saw and cut push rod on the mark.

8.

After cutting rod, thread jam nut off to clean up threads.