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

  TM-9-2320-273-34 - Page 586 of 801

TM9-2320-273-34
(8) Tighten the hex-shaped upper spring seat to obtain a measurement of 1-7/8 in. (4.8 cm)
from the top of the upper spring seat to the bottom of the adjusting screw head. Install locknut.
NOTE
Before installing the spring assembly, be
sure that the exhaust stem and its spring
are in place.
(9) Install spring assembly in body.
(10) Install the retaining ring and install the cover.
(11) Install air governor using two screws (fig. 14-6).
(12) Install all air governor line connections (para 14-86 (7), (8) and (9)).
(13) Check adjustment as described in paragraph 14-11.
14-11. Adjustment.
Preparation.
Perform leakage check and unloader valve adjustment, as described in paragraph
14-2. If adjustment is necessary, proceed to paragraph
b,
below.
b.
Adjustment Procedures.
(1) Remove the cover (5, fig. 14-42).
(2) Loosen locknut (3).
In step (3), do not force valve housing (2)
to move it. Damage can result.
(3) Gently turn valve housing (2) inuntil it bottoms; then back out three-quarter turn and
hold this position while performing step (4).
(4) Turn adjusting screw (4) in (clockwise) until screw just touches the spring located inside
governor (1).
(5) Start up and operate engine. (Refer to TM 9-2320-273-10).
(6) When air pressure reaches 125 psi (862 kPa), observe the following:
(a) If the governor cuts out before reaching 125 psi, stop the engine and turn the adjust-
ing screw (4) in (clockwise) one turn. Then, repeat step (5).
(b) If it still doesn’t reach 125 psi, turn the adjusting screw in another turn; then shut
down engine.
(7) With the air pressure holding at 125 psi (862 kPa), slowly turn adjusting screw out (counter-
clockwise) until the governor cuts out. (The governor will make a dull popping sound when it cuts out. )
(8) Start up and operate engine. (Refer to TM 9-2320-273-10.)
14-39
CAUTIO N


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