BENDIX PR-4 설치 지침 - 페이지 3

{카테고리_이름} BENDIX PR-4에 대한 설치 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. BENDIX PR-4 4 페이지. Pressure protection valves
BENDIX PR-4에 대해서도 마찬가지입니다: 매뉴얼 (4 페이지)

페이지 인쇄

REMOVAL

Before removing the valve, park the vehicle and drain the air

system completely, follow the safety guidelines on page 2.

1. To aid in the installation of the valve, mark the air lines

and their respective ports before disconnecting.

2. Remove and retain the mounting hardware.

3. Remove the valve from the vehicle.

DISASSEMBLY

1. Remove the four (4) round head machine screws while

holding the spring retainer to the body. Remove the

spring retainer.

The spring retainer is under a spring load and must

be removed carefully.

2. Remove and retain the spring(s) under the retainer for

reuse.

NOTE: Some Bendix

and Bendix

PR-4

Pressure Protection Valves have

™

only one (1) spring and some will have two (2).

3. Remove and discard the piston assembly.

NOTE: This would conclude the disassembly procedure

for a PR-4 pressure protection valve (Figure 2). The

following steps are for the PR-3 reservoir control valve

(Figure 1).

4. Discard the retaining ring.

5. Remove and reuse the o-ring retainer.

6. Remove and discard the o-ring, spring, and check valve.

ASSEMBLY

NOTE: Prior to the assembly of new parts into the valve,

clean the internal passages with a suitable solvent and dry

thoroughly. Grease all o-rings, o-ring grooves, bores, and

pistons using the lubricant supplied with this kit.

1. Install the piston assembly in the valve body.

2. Position the spring(s) on the piston and install the spring

retainer.

3. Secure the spring retainer using the four (4) round head

machine screws. Torque the screws to 20-30 in-lbs

(2.3-3.4 N•m).

This completes the reassembly of the PR-4

pressure protection valve. Proceed to step 4 for the

PR-3 reservoir control valve.

4. Install the spring on the check valve and install in the

valve body.

5. Install the o-ring in the valve body.

6. Install the o-ring retainer taking care that the spring

fits in the protrusion provided on the o-ring retainer

(See Figure 1).

7. Install the retaining ring.

PR-3

Reservoir Control Valves

™

INSTALLATION

1. Clean the air lines connecting to valve.

2. Inspect all lines and/or hoses for damage and replace

as necessary.

3. Install the valve and tighten the mounting bolts.

4. Connect the air lines to the valve.

OPERATING AND LEAKAGE CHECKS

OPERATING CHECKS

1. Provide a pressure gauge and drain the valve at the

supply side and delivery side of the pressure protection

valve being checked.

2. Build up the air system to full pressure and shut off the

engine.

3. While watching the gauges on the supply and delivery

sides of the valve, slowly begin to exhaust pressure

from the delivery side. Note that both gauges will show

pressure loss until the closing pressure of the pressure

protection valve is reached.

The pressure protection valve should close within ±5 psi

of the pressure indicated on the valve's label or in the

vehicle handbook. The gauge on the delivery side of the

valve should continue to show loss of pressure while

the gauge on the supply side should stop at the same

pressure as the setting of the valve.

4. (PR-3 reservoir control valve only) Build pressure up

and slowly exhaust air from the supply side of the PR-3

reservoir control valve. The gauge on the delivery side

of the valve should remain at the highest pressure

previously attained.

LEAKAGE CHECKS

1. Build up the air system to full pressure and shut off the

engine.

2. Apply a soap solution around the cap of the pressure

protection valve. A one (1) in. (2.54 cm) bubble in three

(3) seconds or longer is acceptable. No leakage is

permissible at the bottom of the PR-3 reservoir control

valve.

3. Drain the air pressure from the delivery side of the

pressure protection valve and disconnect the air line

to it.

4. Apply a soap solution to the delivery port. A one (1)

in. (2.54 cm) bubble in five (5) seconds or longer is

acceptable.