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24
foundation brake System (cont.)
To cage the spring:
a) Remove the plastic end cap.
b) Insert the special release bolt in the center-hole
opening. Be sure the formed end of the bolt
engages the piston until it bottoms out.
c) Turn the release bolt 1/4-turn clockwise and pull
the bolt outward to lock the formed end into the
piston.
d) Install a flat washer and release nut on the end
of the release bolt and tighten the nut down
against the surface.
e) Using a 3/4" open-end wrench, turn the nut
clockwise to tighten against the chamber
housing.
f) While performing this procedure, check the
service chamber pushrod to ensure it is
retracting.
g) Continue to tighten the nut clockwise until the
spring is fully compressed and the chamber
piston is fully retracted.
NOTE:
To reactivate the spring brake from a released
position, perform these steps in reverse order.
WaRNING:
If the spring brakes are caged or deactivated,
the vehicle will not have emergency or parking
brakes. The vehicle must not be driven in traffic
or not parked without blocking the wheels. It
is important to understand that a caged spring
brake eliminates the emergency breakaway
feature of the system and represents a potential
danger.
The trailer should not be released into service
while the spring brake is inoperative.
!
Spring brake Diagram
SySTeMS aND feaTUReS
Summary of Contents for Dry and Refrigerated Van Trailers
Page 4: ......
Page 6: ...2 Introduction Example VIN Tag...
Page 20: ...16 Standard Wabash Wiring Schematic Systems and Features...
Page 38: ...34 Operation...
Page 42: ...QMS F 0604 Rev 2...