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TM 9-70757B A S I C HAL F-T RAC K VEHICLES IHC) PERSONNEL CARRIER MS, C A R M9A1MULTIPLE GUN MOTOR C A R R I A G E Ml4 AND SIMILAR IHC VEHICLES)

S .RA PD 18386

igu re 9 Tens ion Sc rew a n d S p r i n g s R e m ova l fig. 90 ).

PLIERS WRENCH, 2*/ -in.Remove cotter key and remove shackle shaft nut.

RA PD 18387Figure 9 Loosening Idler Post Brace L o c k Nuts

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T 9 70757

B OGIE SUSPENSION AND T R AC K

R P 8388

Figure 9 Idler os t race Removal

(fig. 91 .WRENCH, end, -in.

Loosenlock nuts and adjusting nut of idler post brace.WRENCH, -in.

Remove four bolts, nuts, and washers holdingbraceto frame.fig. 92 ).

WRENCH, -in. WRENCH,1-in.Remove threebolts nuts, andwashersfrom idler stop screwbracket

toframe.fig. 93 .

WRENCH, y -in . WRENCH, 1-in.Removefour bolts nuts, and washers from tension spring support

bracket to frame.

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TM 9-70757B A S I C H A L F - T R A C K VEHICLES IHC) PERSONNEL CARRIER MS, C A R M9A1MULTIPLE GUN MOTOR C A R R I A G E Ml4 AND SIMILAR IHC VEHICLES)

R P D 18389Figure 93 Idler S t o p S c r ew and Bracket Removal

1) E Q U I P M E N T .Use same equipment as listed for removal in subparagraph b above.2) P R O C E D U R E

Tighten lock nuts securely.

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TM 970757

B OG IE SUSPENSIO N AND TRA CK

Figure 9 Measuring Casting Depth RA PD 83 6

Screw

par. 55).subpar. d below).

i

Proper tension ofthe trackis maintainedby meansof theadjustingidler mechanism. Correct band track tensionisdenned as that track tension which allows a 150-pound load, placed on thecenter of the trackmidway between the top roller and the idler, to produce a -inch deflection or sag measured between the topsurfaceof thetrack anda straightline tangent to the top surface of the track at the top roller and theidler. Thetension of the track is governed bythe tensionsprings, which,when correctly adjusted, have a compressed length of from 13 inchesto 3s/s inches. Tracktension is increased by moving the track idler tothe rear anddecreasedby movingthe idler forward. Thecorrect idler

83