Freightliner Business Class. Manual - part 20

10.3

If the rear radial seal on the engine
crankshaft is leaking, replace the rear ra-
dial seal. For procedures, see the engine
manufacturer’s manual.

11. Remove the chocks from the tires.

26-10 Mercedes-Benz

Transmission Fluid
Changing and Magnetic
Plug Cleaning

Draining

Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.

Drain the transmission fluid. See

Fig. 19

NOTE: Drain the transmission fluid while the
transmission is warm.

2.1

Remove the magnetic drain plug from the
bottom of the gear case.

2.2

Discard the aluminum gasket.

2.3

Catch the transmission fluid in a suitable
container and dispose of it properly.

Clean the area around the fill plug.

Remove the fill plug from the side of the case.
Discard the aluminum gasket.

NOTE: Use a piece of key stock, or any other
convenient steel slug, to short the two magnetic
poles and divert the magnetic field.

Clean the magnetic drain plug before installing it.

Install the drain plug (p/n A 124 997 01 32) and a
new aluminum gasket (p/n N 00763 024105).
Tighten the drain plug 42 lbf·ft (57 N·m).

Filling

CAUTION

Operating a manual transmission with the fluid
level higher or lower than recommended can re-
sult in transmission damage. Do not overfill the
transmission; overfilling will force transmission
fluid out of the case through the main shaft open-
ings.

Add transmission fluid until it is level with the
lower edge of the fill opening. See

Fig. 19

for

location of the fill plug and

Fig. 20

for correct

level. See

Table 8

for approved transmission lu-

bricants and

Table 9

for lubricant capacities.

MBT Transmission Lubricant Types

Manufacturer

Type

Mobil

Mobiltrans SHC 50 (RN 2952

E-2)

Table 8, MBT Transmission Lubricant Types

05/22/2001

f261102

NOTE: The transmission is shown from the left-hand
side.

Transmission

Fill Plug

Drain Plug

Fig. 19, MBT Transmission Drain and Fill Plugs

f260006b

10/05/94

A. Full

B. Low

Fig. 20, Transmission Fluid Level Checking

Transmission

26/20

MBT Transmission Lubricant Capacities

Transmission Model

Refill Capacity

quarts (liters)

MBT660S-6O

9.5 (9.0)

MBT520S-6D

9.5 (9.0)

Quantities listed are approximate. Fill the transmission until the lubricant

is level with the bottom of the fill hole, with the vehicle in normal operating
position.

Table 9, MBT Transmission Lubricant Capacities

CAUTION

Use only Mobiltrans SHC 50 (RN 2952 E-2) fluid.
Do not mix fluid types. Adding RN 2952 E-5 fluid
(used in Eaton and Meritor transmissions) could
damage the radial seals.

Clean the fill plug before installing it.

Install the fill plug (p/n N000908 020001) and a
new aluminum gasket (p/n N 00763 024105).
Tighten the fill plug 42 lbf·ft (57 N·m).

Transmission

26/21

Title of Maintenance Operation (MOP)

MOP Number

Fifth Wheel Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–02

Fifth Wheel Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–03

Frame Fastener Torque Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–01

Holland Fifth Wheel Sliding Mechanism Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–04

Frame and Frame Components

Index, Alphabetical

Business Class Trucks Maintenance Manual, December 2002

31–01 Frame Fastener Torque

Checking

Because of "bedding in" (or seating), the frame fas-
teners must be torqued at the recommended inter-
vals. These intervals apply to new vehicles, and to
frame fasteners that have been removed and in-
stalled.

NOTE: For off-highway operations, retorque the
frame fasteners the first 1000 miles (1600 km),
then periodically, depending on the operating
conditions.

CAUTION

Continued vehicle operation with insufficiently
tightened fasteners could result in bracket or
frame damage.

Typical frame fastener applications include front
frame brackets, suspension brackets, spring brack-
ets, fuel tank, exhaust and engine supports, frame
crossmembers and gussets, and fifth wheel mounting
brackets.

See Group 00 of the

Business Class

Trucks Ser-

vice Manual

for additional information on fasteners

and torque values.

Tighten all Freightliner AirLiner suspension fasteners
to the torque values in

Table 1

. Also, tighten all sus-

pension air line fittings and air lines.

Freightliner Airliner Suspension

Torque Values

Description

Size

Torque

lbf·ft (N·m)

Leveling Valve Adjustment Nut

1/4–20

5 (7)

Leveling Valve Mounting Bolt
Nuts

5/16–18

14 (19)

Air Spring Upper Mounting
Locknuts

3/4–16

45 (61)

1/2–13

23 (31)

Air Spring Lower Mounting
Locknuts

1/2–13

55 (75)

Leaf Spring Mounting Eye Bolt
Locknuts

3/4–16

270 (365)

Shock Absorber Upper Bracket
Mounting Locknuts

5/8–11

125 (170)

Freightliner Airliner Suspension

Torque Values

Description

Size

Torque

lbf·ft (N·m)

Air Spring Upper Mounting
Bracket

5/8–11

125 (170)

Spring Hanger Mounting
Locknuts

3/4–10

210 (285)

Lateral Control Rod Nut

5/8–11

185 (136)

Table 1, Freightliner AirLiner Suspension Torque

Values

Tighten Hendrickson suspension fasteners to the
torque values given in

Table 2

Hendrickson Suspension

Torque Values

Description

Size

Torque

lbf·ft (N·m)

Top Pad to Spring
Aligning Setscrew
(RT/RTE)

—

100–150 (135–200)

Top Pad Nut
(RT/RTE)

—

275–400 (375–542)

U-Bolt Locknut (U/UE)

7/8–14

237–302 (321–409)

Spring Pin Locknut

1/2–13

45–63 (61–85)

Torque Rod Straddle
Mount Nut

5/8–11

190 (260)

Torque Rod Stud
Locknut

1-1/4–12

175–225 (235–305)

Saddle Cap Stud

7/8–14

55–65 (75–90)

3/4–16

Saddle Cap Locknut
(RT/RTE)

7/8–14

225–275 (305–373)

Saddle Cap Locknut
(U/UE)

3/4–16

125–145 (169–197)

Adapter-Type Beam
End Locknut

3/4–16

210–240 (285–325)

Spring Center Bolt

7/16–20

50–60 (70–80)

1/2–20

65–75 (90–100)

1/2–13

Rebound Spacer
Locknut

1/2–13

38–45 (51–61)

Spring Alignment Clip

—

15 (20)

Frame and Frame Components

Business Class Trucks Maintenance Manual, December 2002

31/1

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