Volvo 50-42LE transmission. Service manual — part 15

Smaller

diameter bolt

16mm long

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

59

62. Assemble the pump gears into the pump body
with the dot on the pump gears facing down,
as shown in Figure 113. Lubricate the gears
with a small amount of ATF.
62. Assemble the pump plate on over the two
alignment pins shown in Figure 114.
63. Assemble the piston housing / stator shaft thru
the pump body over the alignment pins as
shown in Figure 115. Using a 30 torx bit, install
the thirteen 13mm long retaining bolts and
torque to 89-124 in.lb. Torque the 16mm long
bolt to 53-62 in.lb.
64. Replace the inner and outer B1 and B2 piston
o-rings as shown in Figure 116.
65. Lubricate the piston o-rings and install the
pistons into the housing shown in Figure 117.

Pump assembly

Figure 116

Figure 117

Figure 115

Copyright © 2004 ATSG

Dot on pump gears face down

Alignment pin

Alignment pin

B1 piston

B2 piston

Inner o-ring

Outer o-ring

Outer o-ring

Inner o-ring

Figure 113

Figure 114

Pump plate

SUB-ASSEMBLIES

"PUMP" CONTINUED

Continued on Page 60

30 torx

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

60

66. Using a suitable press, depress the B1 return
spring and assemble the retaining snap ring,
as shown in Figure 118.
67. Assemble the B2 second coast brake hub thrust
washer as shown in Figure 119.
68. Assemble the two B1 steel plates and two B1
clutch plates into the housing as shown in
Figure 121. Refer to the exploded view in
Figure 120 for assembly purposes.
69. Assemble the return spring assembly into the
housing as shown in Figure 122.

SUB-ASSEMBLIES

"PUMP" CONTINUED

Figure 118

Figure 119

Figure 121

Figure 122

Thrust washer

Continued on Page 61

Assemble B1 clutch assembly

B1 return spring

Snap ring

B1 clutch assembly

Steel plate

thickness .072"

Pressure plate
thickness .137"

Snap ring

Clutch plate

thickness .070"

Return spring assembly

Copyright © 2004 ATSG

Figure 120

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

61

70. Assemble the B1 upper pressure plate on top of
the spring retainer as shown in Figure 123.
Press it down and assemble the retaining snap
ring. Check B1 clutch clearance using a feeler
gage. Clearance should be between .030"-.040."
71. Assemble the B2 clutch assembly into the
housing starting with the .145" thick pressure
plate, as shown in Figure 124, ending with the
snap ring. Check the clearance between the top
pressure plate and the top B2 clutch plate. The
clearance should be between .025"- .030."
72. Using a rubber tip blow gun, air check the B1
and B2 clutch assemblies , thru the two ports,
as shown in Figure 126.
73. Install pump o-ring as shown in Figure 127.

Figure 123

Figure 125

Figure 124

Figure 126

Figure 127

SUB-ASSEMBLIES

"PUMP" CONTINUED

B1 upper pressure plate

Caution

spring loaded

.030" to .040"

clearance

.035"

B2 clutch assembly

B2 clutch assembly

Pressure plate
thickness .145"

Snap ring

Clutch plate

thickness .068"

Pressure plate
thickness .145"

Steel plate thickness .100"

.025" to .030"

clearance

.030"

B1 air check

B2 air check

Pump o-ring

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

62

74. Remove the inner race rotating it clockwise as
shown in Figure 128.
75. Turn the inner race upside down to check for
wear in the area where the sprag rides. Replace
as necessary. See Figure 129.
76. Remove the sprag and end bearings from the
outer race, as shown in Figure 130, and check
for wear in the area where the sprag rides.
Replace as necessary.
78. Inspect the sprag elements for wear as shown
in Figure 131. Replace as necessary.
79. Refer to Figure 132 for a view of the complete
assembly disassembled.

Figure 128

Figure 130

Figure 132

Continued on Page 63

Figure 131

Figure 129

Check for wear here

Inner race thrust washer

Sprag and end bearings

SUB-ASSEMBLIES

"B2 COAST BRAKE HUB AND SPRAG"

Inner sprag race

Outer race

Sprag elements

I.D. rib

Inner race

thrust washer

Inner race

Sprag and

end bearings

Outer race

Rear thrust

washer