Thomas SAF-T-LINER C2, Maintenance Manual

Page: 132 / 176

6. Using bolts, nuts, and washers, attach the reser-
voir to the mounting bracket.
7. Fill the reservoir with an approved power steer-
ing fluid to the line between the MIN COLD and
MAX HOT lines. See
Fig. 1 . See Table 1 for ap-
proved power steering fluids.
Approved Power Steering Fluids
Fluid Type
*
Approved Fluid
*
Automatic Transmission
Fluid
Dexron® III
Dexron® II
*
Do not mix fluid types. Refer to the text in this group for a detailed warn-
ing statement.
Table 1, Approved Power Steering Fluids
8. Raise the front of the vehicle and support it with
jack stands.
9. Start the engine and operate it at idle. Turn the
steering wheel from full left and full right several
times until clean fluid starts flowing from the
power steering filter cover. Add fluid to the reser-
voir to maintain the fluid level between the MIN
COLD and MAX HOT lines.
10. Shut down the engine. Apply a thin film of power
steering fluid on the gasket of a new filter. Then
attach the filter to the filter cover. Make sure that
the gasket under the filter cover is not damaged.
If the gasket is damaged, replace it. Install the
gasket on the reservoir. Install the filter and filter
cover in the reservoir.
11. Attach the retaining ring to the reservoir to se-
cure the filter and filter cover.
12. Start the engine and check that the power steer-
ing fluid level is between the MIN COLD and
MAX HOT lines. Add more fluid if needed.
13. Raise the vehicle, remove the jack stands, and
lower the vehicle.
14. Remove the chocks from the tires.
46–03 Power Steering Fluid
Level Inspecting
1. Apply the parking brake and chock the rear tires.
2. With the engine cool, the fluid level should be
between the MIN COLD and MAX HOT lines with
the engine off.
3. Add or remove fluid as necessary to bring the
fluid level between the MIN COLD and MAX
HOT lines. See
Table 1 for approved power
steering fluids.
4. With the engine hot, the fluid level should be at
the MAX HOT line with the engine off.
5. Add or remove fluid as necessary to bring the
fluid level to the MAX HOT line. See
Table 1 for
approved power steering fluids.
6. Remove the chocks from the tires.
46–04 Power Steering Gear
Lubricating
TRW THP Series
CAUTION
Apply grease to the sector shaft with only a hand-
type grease gun. Use of a high-pressure power
grease gun will supply grease too quickly and
could affect the high pressure seal, contaminating
the hydraulic fluid.
Using a hand-type grease gun, apply NLGI Grade 2
or 3 multipurpose chassis grease until it starts to
come out past the sector shaft seal.
46–05 Drag Link Lubricating
1. Using a clean rag, wipe all dirt from both drag
link grease fittings.
2. Using a pressure gun, apply grease at the
grease fittings until old grease is forced out of
the socket. Use multipurpose chassis grease
NLGI Grade 2 (8% 12-hydroxy lithium stearate
grease) or NLGI Grade 1 (6% 12-hydroxy lithium
stearate grease).
NOTE: NLGI Grade 2 is the preferred grade.
Steering
46
Saf-T-Liner C2 School Bus Maintenance Manual, August 2020
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