SANY SRT95C Off-Highway Truck. Service Manual

Less than 0.14 bar (2 lbf/in2) air pressure loss
in 15 minutes is satisfactory. If the air pressure
loss is greater than 0.14 bar (2 lbf/in2) in 15
minutes, rotate the wheel additionally to reseat
all seals and pressurise the brake assembly
to 2 bar (30 lbf/in2). If the brake assembly
again leaks more than 0.14 bar (2 lbf/in2)
air pressure in 15 minutes, loosen the wheel
retainer bolts, rotate the wheel to reseat the
seals, and tighten the bolts. Repeat the air
pressure test to be sure the seals are properly
seated, to prevent oil leaks.

Note

: Be sure to open and install only one

hydraulic line at a time to prevent loss of oil
from brake hydraulic oil tank. The vacuum
pump, installed during removal, cannot retain
oil in tank if more than one line is uncapped at
a time.
20. Remove the plugs and connect the
hydraulic pipe of service brake to the port ‘C’
according to the mark made during removing.
Refer to Fig.2.
21. Similarly, connect the pipeline of parking

Fig.18 Schematic diagram for pressure test of brake

1. Adaptor

5. Pressure gauge

2. Pressure regulator

6. Hose assembly

3. Tee piece

7. Flange plate (For ‘B’)

4. Switch valve

8. Flange plate (For ‘A’)

Rear Axle Assembly And Installation

brake to the port ‘D’. See Fig.2.
22. Similarly, connect cooling pipe to the ports
‘A’ and ‘B’. Refer to Fig.2.
23. Remove the vacuum pump required to be
installed on the hydraulic oil tank for removing
the pipes. Then reinstall the ari breather into
the breathing port of oil tank.
24. Refer to the requirements in the section of

‘LUBRICATION AND MAINTENANCE’ , and fill

the steering and brake control oil tank.

Note

: If brake discs, service and/or parking

pistons, piston housing, or the complete
brake assembly have been replaced, a new
brake disc stack height measurement should
be taken as described under 'Disc Assembly
Wear Measurement Procedure', under
'Inspection' in this section. This dimension ‘H'
should be measured for future reference.

Bleeding

Refer to Fig.1 for numbers in brackets.
To achieve satisfactory braking, the service
brake and parking brake hydraulic system
must be bled to elimite any air in hydraulic
pipes and system.
1. Ensure that the steering and brake control

tank is filled with oil specified in the section of

lubrication and maintenance.
2.  Start  engine,  build  up  oil  pressure  in
accumulators  until  accumulator  pressure
warning  lights  are  extinguished,  then  shut
down engine.
3. Chock all road wheels. Pull out parking/
emergency  brake  control  to  release  the
brakes.
4. Securely connect a clean bleeder hose to
upper bleeder screw (49) and place loose end
of hose in a clean container.
5. Press down the service brake pedal and
gradually open bleeder screw (49). Bleeder
screw should remain open until oil that flows
out is free of air bubbles. Close bleeder screw
and release brake pedal.

Note

: Pressurize the system again when

Rear Axle Assembly And Installation

necessary by repeating Step 2.
6. Repeat the above full process on the brake
assembly in the opposite side.

Note

: A correct oil level in the steering

and brake control oil tank must be always
maintained and the selected oil should
conform to the specifications recommended
in the section of lubrication and maintenance.
For the correct oil level, refer to the section of
hydraulic oil tank assembly.

Note

: The full bleeding procedure should be

repeated on the brake assembly after repair
and maintenance to ensure that all air in the
brake assembly is completely eliminated.

Special tools

The hoist tool for parking piston can be
manufactured according to the structure and
dimensions shown in Fig.22.

Technical conditions of special torque

No. Description

Torque

lbf·ft

Bolt

1166~1193

860~880

Bolt

260~280

Screw

260~280

Nut

1166~1193

860~880

Rear Axle Assembly And Installation

Fig.19 -1 Fabrication of spring compression tool

1. Welding base

6. Bolt

2. T handle

7. Rotating shaft

3. Washer

8. Damper

4. Nut

9. Shaft

5. Handle

Rear Axle Assembly And Installation

Fig.19 -2 Fabrication of spring compression tool

Ф6

+0.05
+0.02

25.5

C1.5

101

3.2

12.5

3.2

6.3

Detail drawing of Item 1

Rear Axle Assembly And Installation

Fig.19 -4 Fabrication of spring compression tool

Fig.19 -5 Fabrication of spring compression tool

6.5

3.2

Ф5.5 Through hole

2×Ф5.5

6.5

Detail drawing of Item 1

Rear Axle Assembly And Installation

Fig.19 -6 Fabrication of spring compression tool

2×Ф4.5

6.3

4.5

Detail drawing of Item 8

Rear Axle Assembly And Installation

Fig.20 Fabrication for flange plate of port A

117

77.8

4×Ф14

12.5

R51.6

R15

42.9

1/2NPT

6.3

3.2

4.45±0.13

Ф7.1±0.13

Ф66.7±0.25

A-A

R 0.6
R 0.2

Rear Axle Assembly And Installation

Fig.21 Fabrication for flange plate of port B

Ф7.1±0.13

Ф66.7±0.25

4.45±0.13

6.3

1/2NPT

3.2

A-A

R 0.6

R 0.2

77.8

108

R51.6

R15

12.5

28.4

42.9

4×Ф14

Rear Axle Assembly And Installation

3.2 Rear Axle Mounting Part

Overview of operating principle

See Fig.1 for the numbers in the brackets.
The rear axle mounting part consists of the
tapered pin (6), Spacer (5), bush (4), plate
(3), bolt (2), steel wire (1), spacer (7), shaft
(8), washers (9) and bolt (11). The rear axle
mounting parts are the assembly to connect

Fig.1 Rear axle mounting part

1. Steel wire

7. Spacer

2. Bolt

8. Shaft

3. Plate

9. Washer

4. Bush

10. Washer

5. Spacer

11. Bolt

6. Tapered pin

Rear Axle Assembly And Installation

rear axle assembly to frame via A-frame and
link.

Remove and disassembly

See Fig.1 for the numbers in the brackets.

warning

To prevent personal injury and property

damage, be sure lifting equipment is of

adequate capacity and properly secured to

do the job safely.

1. Use the hoist equipment to lift up the rear
axle assembly. Remove the bolt (11) and
washers (10) and (9). Then take down the
shaft (8) and spacer (7) in turn.
2. Remove the steel wire (1) and bolt (2). Then
take down the pressure plate (3), bush (4),
Spacer (5) and tapered pin (6) from the hole of
A-frame in turn.

Inspection

1. Clean all metal parts in a suitable solvent,
using a brush to clean bearings. Dry all parts
on a clean surface and allow bearings to dry
naturally. Make sure parts are free from dirt.
2. Check all inner and outer grooves for
cleanliness. Check components for cracks,

scores, blemishes or burrs. Use a fine stone to

smooth out defective areas. Replace any parts
that show excessive wear.
3. Inspect fittings, plugs, studs and their
seating positions for thread wear. If threads
in any of these parts are damaged, replace
parts.
4. Check the bush and spacer ring for wearing
or deformation. Replace the defective parts
and components.
5. Replace the old washers with new ones.

Assembly and installation

See Fig.1 for the numbers in brackets.

Rear Axle Assembly And Installation

warning

To prevent personal injury and property

damage, be sure lifting equipment is of

adequate capacity and properly secured to

do the job safely.

Note

: Tighten all fasteners without special

torques specified to standard torques listed in

Section38.2

Standard bolt and nut torque specifications.

1. Use the hoist equipment to lift up the rear
axle assembly. Place this assembly under
the truck and align it with the frame. Use a
hydraulic jack with proper carrying capacity
to slowly lift up the axle body assembly to the
installation position on the truck.
2. Install the tapered pin (6), Spacer (5), bush
(4) and plate (3) in turn. Then tighten the bolt

(2) at the specified moment and use the steel

wire (1) to lock it.
3. Install the shaft (8) and spacer (7) in turn
onto the link; apply the mucilage onto the bolt
(11). Then install the washers (9) and (10) and
bolt (11) in turn. Finally, tighten the bolt (11) at

the specified moment.

Rear Axle Assembly And Installation

4 REAR WHEEL ASSEMBLY

4.1 Rear Wheel Assembly

Overview

The rear wheel assembly consists of two tyre
and rim assemblies, spacer band, wedge
band, rim clamp and nut.
The tyre and rim assembly is designed to be
replaced with a pre-assembled tyre and rim.

Preparation for Servicing

warning

Before loosening rim clamps or performing

any service on the tyre or rim components,

to prevent personal injury and property

damage, completely deflate tyre by

removing the valve cap and core. Insert

a thin wire through the valve to be sure

the valve is not plugged. Even a flat tyre,

Fig.1 Sectional View of Dual Wheel Rim Assembly

1. Flange

7. Spacer sand

2. Rim

8. Wedge band

3. Bead seat band

9. Stud

4. Wheel

10. Clamp

5. ‘O’ Ring

11. Nut

6. Lock Ring

Rear Wheel Assembly

in some cases, will retain sufficient air

pressure to blow off a rim component with

enough force to cause injury or death.

warning

Gases that build up inside an air inflated

tyre mounted on a rim during welding or

heating of rim components can ignite,

causing an explosion of the tyre and rim

components. This warning also applies

to Nitrogen gas inflated tyres. Ignition will

not occur in a Nitrogen gas atmosphere;

but the pressure build up from the applied

heat may be sufficient to cause a blowout

severe enough to injure or kill. Never

weld or otherwise apply heat on rim

components with the tyre mounted on the

rim, whether the tyre is inflated or deflated,

to prevent injury or property damage

from the potential tyre explosion! Do not

attempt to repair rims or rim components

by welding or heating, even if the tyre is

not mounted on the rim. It is recommended

to scrap questionable rim parts unless

specific permission and repair procedures

are obtained in writing either from the

company or the rim manufacturer.

Removing Tyre and Rim Assembly

Numbers in parentheses refer to Fig.1.
If the tyre and rim assembly is to be replaced
with a pre-assembled tyre and rim assembly,
it is not necessary to remove the tyre from
the rim on the truck. The tyre and rim may be
removed from the truck as an assembly, and
transported to a more desirable location for
removing the tyre from the rim.

Rear Wheel Assembly

SANY SRT95C Off-Highway Truck. Service Manual - page 12