Document 6wqDmBxexKvObjeZDy5kkywGm
BULLETIN
JUNE 8. 1979
_________________ No. Q87 under brakes
for branches, distributors and customers. (Supersedes Bulletin dated MARCH 15, 1978)
CHASSIS AFFECTED ALLENTOWNSZT HAYWARD0 OAKVILLEEJ
ANTI-WHEEL LOCK PICKUP AND VALVE/CONTROLLER ASSEMBLY Service Subassemblies and Components (Eaton, Goodrich and Bendix)
PURPOSE To provide service personnel with part numbers of the component parts used in subject assemblies.
RECOMMENDATION Whenever possible, replace failed components instead of the complete assembly when servicing anti-wheel lock valve/controller assemblies and wheel speed pickups. This practice will lower cost of replacement parts and gen
erally reduce labor time.
INFORMATION Anti-wheel lock controller assemblies consist of three major components or subassemblies which can easily be re placed in the field. They are the valve, controller and solenoid(s). The following parts list shows part number of the valve/controller assemblies currently in use and their components.
Valve/Controller Assembly Component Parts - See Figures 1, 2, 4 and 5.
Vendor Assembly No.
Controller
Eaton Model 5MN41R-P1 (J;Z719-630083(POS. Grd.)
21 5MN41R-P2 (1)2719-630069(Neg. Grd.)
Model 5mn4Sr
2719-630383(Neg. Grd.)
1201 5MN401R
2719-630380lNee. Grd.I
B. F. Goodrich 5MN35R
7MN31R
5MN49R
745-289670(Neg. Grd.)
Bendix
5MN400R
745-289359(Neg. Grd.)
5MN402R
745-289359(Pos. Grd.)
5MN403R
745-289670(Pos. Grd.)
Valve
Solenoid Kit
2719-600084 2719-640023
2719-600084 2719-640023 2719-600084 2719-640023 3355-1700-6 (j)33 55-1670-1
745-269614 745-289278 745-289614 745-289278 745-289614 745-289278 745-289614 745-289278
Q Includes gasket, harness pigtail and clip Includes O-rings Includes O-rings and cover gasket
CIRCULATIO
Sarvica Managar
Shop Fonmin
Night Foreman
Night Foreman
Inapactor Laadman
Inapactor Laadman
Inapactor Laadman
Unit Ovarhaul Room
v s n Nl OHNIW
Page 1 (Continued Page 2) Service Operations, Allentown, Pa. U.S.A.
Shop Offtca
Mack
JUNE 8, 1979
1. GROUND STRAP NUT - NEGATIVE GROUND UNIT 2. GROUND STRAP NUT - POSITIVE GROUNO UNIT
FIGURE 3
3. CONTROLLER 4. VALVE 5. 1/4 IN. SPADE TERMINALS (SOLENOID NO. 2)
6. 3/18 IN. SPAOE TERMINAL (SOLENOID NO. 1) FIGURE 4
B.F. GOODRICH VALVE/CONTROLLER ASSEMBLY SMN 3SR
1. CONTROLLER 2. SOLENOID
3. O-RINGS 4. VALVE
FIGURE 5 BENDIX VALVE/CONTROLLER ASSEMBLY
Wheel speed pickup assemblies consist of the pickup, pickup gage blocks and mounting bracket. Gage blocks experience some wear during the initial operating period following a clearance adjustment. They must be re placed when the wear indicator grooves are no longer visible. The fol lowing parts list shows part numbers for the gage block service kit and the pickup. Bracket part numbers are not shown because they vary de pending on the axle used. Consult chassis record for correct bracket part number.
Page 3 Q87 (Continued Page 4)