BENDIX TC-2 Инструкции по установке - Страница 3

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ASSEMBLY

Prior to assembly, lubricate the body and cover bores, cam

and cam follower, piston o-ring, and cover top with Dow

Corning

55-M pneumatic grease (Bendix piece number

291126).

1. Press inlet valve on stem. A little water in the boot

valve or some soap on the stem will make it easy to

press on the inlet valve.

2. Place stem with inlet valve installed in the inlet seat.

Insert some object – such as a cap screw – to hold

the inlet valve up against its seat.

3. Position the spring and the exhaust valve guide.

4. Depress the guide and the spring, then press the

exhaust valve on the stem.

5. Place the seal o-ring over the insert seat. Install the

inlet and exhaust insert in the body, securing with cap

screws and lock washers. Recommended torque on

the insert cap screws is 60 to 80 in-lbs.

6. Install the piston return spring.

7. Install the piston o-ring on the piston and install the

piston in the body.

8. Install the adjusting ring in the cover and screw it down

until it is flush with the top of the cover.

9. Place the cam follower and cam in the cover.

10. Position the graduating spring and gasket in the body.

11. Connect the body to the cover; tighten the cap screws

evenly and torque to 75-95 in-lbs.

12. Install the adjusting ring lock washer, head seal o-ring,

and head.

13. Install the set screw in the head of the remote-operated

type valves.

At this stage, before installing the handle and the spirol pin

of the handle-operated type valve, if facilities are available,

the rebuilt valve should be tested and adjusted. If facilities

are not available, the valve can be tested on the vehicle.

ADJUSTABLE

Generally, the Bendix

TC-2

full reservoir pressure; however, there are a few exceptions

in special applications.

1. If the delivered pressure is below the specified final

delivery pressure, it can be adjusted by removing the

head and adjusting the ring lock washer and rotating the

adjusting ring clockwise to raise the delivery pressure.

Care should be taken not to raise the delivery pressure

beyond the design limits; exhaust opening could be

restricted.

Brake Valve should deliver

™

2. If the delivery pressure is above the specified final

delivery pressure, it can be lowered by rotating the

adjusting ring counterclockwise.

A spanner wrench can be used to rotate the adjusting ring,

but if this wrench is not available, the adjusting ring can

be turned with a small screwdriver inserted in one of the

inner notches of the ring. Turning the adjusting ring one

notch will raise the delivered pressure approximately 5 psi.

INSTALLATION

1. Check and clean the air lines to the valve.

2. The operating mechanism for remote type should be

checked for functionally and for proper adjustment.

3. Mount the valve with clamp and mounting bolts.

4. Tighten the mounting bolts evenly to approximately 200

in-lbs torque (3/8-16 Bolt torque 180-220 in-lbs).

5. If remote type valve, connect the operating mechanism.

OPERATING TEST

Connect an accurate test gauge to a delivery port. When

the handle is moved to the fully applied position, the gauge

should register full reservoir pressure.

Note:

Some valves may be preset to deliver lower than

reservoir pressure; however, the standard valves

generally used on tractors are set to deliver full

reservoir pressure.

Intermediate positions should deliver proportionate

intermediate pressure. Upon release, the gauge should

immediately register zero.

LEAKAGE TEST

Locate the exhaust port or the exhaust line and apply a

soap solution. (It is common practice to connect a line

from the valve exhaust port to a location remote from the

immediate driver's area.) With the valve in the released

position, exhaust leakage should not exceed a 1 inch bubble

in 5 seconds (100 sccm).

With the valve fully applied, leakage at the exhaust should

not exceed a 1 inch bubble in 3 seconds (175 sccm).