Hino 600, Руководство по ремонту, Страница: 330 / 451

SERVICE BRAKE (FULL AIR BRAKE) BR02–52
(3) Using a 15/16 inch wrench, unscrew hex nuts on mounting bolts and
cautiously remove the old chamber from the mounting bracket.
(4) Cut the service push-rod to proper length.
(5) Remove the hex nut and the flat washers on the mounting bolts of the
new chamber, clean the face of the mounting bracket and install the
chamber on the bracket with close attention given to positioning the
chamber air inlet ports for correct alignment to the vehicle lines. Then
install one flat washer and hex nut on each mounting bolt and using a
15/16 inch hand wrench
(DO NOT USE AN IMPACT WRENCH) ,
tighten nuts to MGM Brakes recommended 133-155 Lbs-Ft. torque .
IMPORTANT
•
If it is required to reposition the air inlet ports to assure proper
mating and alignment with vehicle air lines, refer to Section 5 on
page BR02-55 and 56 of this manual and follow Steps (3) through
(6) very carefully.
•
When installing any MGM Brakes model with the breather tube it
is mandatory to position the non-pressure chamber end of the
breather tube in upper half of chamber facing away from the road
surface. Failure to comply will void the MGM Brakes Warranty on
these models.
(6) Reconnect yoke to the slack adjuster, being sure that the correct
diameter and length of yoke pin is installed into the correct hole in the
slack adjuster. Secure the yoke pin with a new cotter pin.
IMPORTANT: When making a reconnection to an automatic slack
adjuster follow the vehicle manufacturer's recommendations for instal-
lation and set-up.
(7) Inspect the push-rod to be sure that it is working free, not bent, not
binding an is square to the chamber bottom within

3

in any direction
at any point in the stroke of the chamber. If the push-rod is not square,
make corrections by repositioning the chamber on the mounting
bracket and/or by shimming the slack adjuster to the right or left on
the camshaft as required.
(8) Apply a non-hardening sealing compound to the hose fittings and re-
install both of the air lines to the chamber being sure each is mated to
the correct air inlet port according to the markings made earlier.
MGM
Brakes recommends the fittings be tightened to 25-30 Lbs.-Ft.
torque into the chamber air-inlet ports
.
(9) Using the vehicle system air, charge the spring brake with full line
pressure (minimum 100 psi). Spray only soapy water or leak detection
solution (NEVER ANY TYPE OF OIL!) to the air line fittings and
inspect for air leaks. If bubbles appear, tighten fittings slightly, but not
over 30 Lbs.-Ft. torque.
IMPORTANT: If the service brake clamp ring was loosened to reposi-
tion air inlet ports in Step(5) above, apply air to the spring brake and
then apply and hold foot brake treadle valve down to charge the ser-
vice brake chamber. Test for air leaks around the circumference of the
service clamp ring using soapy water or leak detection solution. If
bubbles appear, firmly tap the circumference of the clamp ring with a
hammer and retighten the clamp nuts until leaks cease.
MGM Brakes
recommends 30-35 Lbs-Ft. torque on clamp hex nuts. Completely
exhaust air from both of the chambers when complete.
(10) With air pressure now exhausted from the service chamber, but still
applied on the spring brake, remove release-nut, washer and release-
bolt for all "TR" models. Replace these parts in their storage pocket on
chamber (or in vehicle tool box if storage pocket is not present on
chamber) and tighten nut against flat washer to 10 Lbs.-Ft. torque.
(11) Replace the END CAP properly. Operating units equipped with the
EXTERNAL BREATHER TUBE without the END CAP and O-RING
SHTS068020200040
Breather Tube
Yes
No
Yes
No
Road Surface
SHTS068020200041