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Sec, 4
Page 78
GM COACH MAINTENANCE MANUAL
BRAKE SPECIFICATIONS
AIR COMPRESSOR AND GOVERNOR
AIR COMPRESSOR
Make
. , , . . , . • .
Model
• . . • • . . . . . •
Capacity (at 1250 rpm).
Unloading
Valve Clearance
Unloading
Valve Springs
Free Height
. . . . . . • .
Height under load of 5.4 - 6.6 lb.
Unloading Valve Lever Spring
Free Height . • . . • . . . . .
Height Under Load of 7. 7 -
8. 7 lb.
Unloading
Valve Stems
Maximum Allowable Wear
Unloading
Valve Bushings
Ream after Installation . .
Discharge Valve Seats
Worn Groove Not to Exceed
Piston Ring Gap (in Cylinder)
Piston Ring Clearance in Groove
Clearance between Piston and Cylinder Wall
Connecting Rod Clearance
Radial
Side
. . . • . . . . . • . . . .
Crankshaft-Maximum Allowable
Out-of-round
. . . . . . . . . . . . . . . . . . .
Cover to Crankshaft Seal Ring Gap (Installed)
Cylinder Bores
Maximum Allowable
Out-of-round
Maximum Allowable Taper
AIR COMPRESSOR GOVERNOR
Make
. . • . • . . .
Model
. • . • . • • •
Cut-out Pressure
Cut-in Pressure
Pressure Range . .
Type
. • . • • . • • . . . • • •
Drum Diameter (Outside)
Brake Shoe Lining
Width
. . . • . . . •
Thickness
HAND BRAKE
Brake Shoe Anchor Pin Bushings
I.D.
(Burnish after assembly)
O.D.
Length
Dia. of holes in shoe
.
Brake Shoe Lever Pin Bushinss
I.D.
(Burnish after assembly)
O.D.
Length
Dia.
of holes in shoe
Anchor Pin
Diameter (at bushings)
Length ( over!i.ll)
Brake Shoe Lever Pin
Diameter
Length
Bendix - Westin&house
. •
2-UE-7-1/4-FW
7 - 1/ 4 cu. ft. per min.
0.010
11
-
0.015
11
1-3/64"
3/4"
27/32
11
5/8"
0,002"
0.2495", - .000
11
+
0.001
11
• • . • . .
0.003"
0.010
11
-
0.015
11
0.0015
11
-
0.0025"
0.002
11
-
0.004"
Not to Exceed 0.002
11
0.006" - 0.015
11
0.001
11
0.008" - 0.015
11
0.003
11
0.003
11
Bendix - Westinghouse
0 - 1
100 - 105 lb.
80 - 85 lb.
15 - 25 lb.
Two-Shoe External Contracting
11
11
6"
5/8"
1.7525
11
-
1.7505
11
Press
fit
in shoe
1-15/64": ~/64"
1.8755
11
1.8735
11
0.6265"
0.6245
11
Press
fit
in shoe
/6
II+
0
1-3
4
- 1/64"
0.7505
11
-
0.7485"
1.748
11
-
1.746"
11-1/4"
0.625
11
-
0.623
11
1-1/4"
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