TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 228 of 801

TM 9-2320-273-34

Figure 7-48, Adjust Pressure Regulator Shims,

(2)

If the low pressure setting is not correct (10th speed, 20-27 psi (140-190

kPa) shims (9)

must be changed, however, in this case shims (6), (13), and (17) must also be changed. If a shim (9) is

added to increase pressure the same thickness shim (6), (13) and (17) must be removed. if a shim (9) is

removed to decrease pressure the same thickness shims (6), (13), and (17) must be added.

(3) If the 12th speed test pressure is not correct (38-45 psi (260-310 kPa) it is only necessary

to change shims (6). Remove shims to decrease pressure or add shims to increase pressure.

(4)

If the 8th speed test pressure is not correct (75=82 psi (520=750 kPa) it is only necessary

to change shims (13). Remove shims to increase pressure or add shims to decrease pressure.

(5)

If the 4th speed test pressure is not correct (88-95 psi (610-660 kPa) it is only necessary

to change shims (17). Remove shims to increase pressure or add shims to decrease pressure.

(6) After correct shim requirement has been determined, remove and disassemble the pressure

regulator (fig. 7-49) only to the point that is required to make the necessary shim change.

7-50

Change 2