BENDIX BX-2150 설치 지침 - 페이지 3

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ASSEMBLY

Use contents contained in both kits.

1. Install the unloader stop and o-ring assembly (1 & 2)

into the threaded port on the top of the head above the

air inlet cavity. Torque to 175-225 in-lbs.

2. Turn the head over and install the unloader piston and

o-ring assembly (3 & 4) into the unloader cavity (short

stem first). Install the unloader spring (16) (small end

first) over the long stem of the unloader piston (4). Install

the inlet valve gasket (13) over the unloader spring and

rest it on the shoulder of the hole in the inlet cavity. Install

the inlet valve seat (7) on top of the inlet valve gasket

(bevel side of the valve seat up). Install inlet valve (15)

on the valve seat. Install inlet valve spring (6) on the

inlet valve. Retain with the inlet valve stop (5). Using a

spanner-type wrench torque to 840-1080 in-lbs.

3. Install the discharge valve spring (11) into the cavity of

the discharge valve stop. Install the discharge valve (8)

on top of the discharge valve spring and retain with the

discharge valve seat (14). Using a 9/16" Allen

torque to 840-1080 in-lbs.

4. Test the head for air leakage prior to installing the head

onto the compressor. Refer to "Air Leakage Tests"

section.

5. Install the cylinder head gasket (12) onto the crankcase.

Place the head in the proper position onto the crankcase

and retain with the four 5/16" cap screws. Snug all four

cap screws prior to torquing in a cross pattern to 175-

225 in-lbs.

6. Install the inlet fitting or air strainer onto the compressor.

Install the strainer gasket (10) between either

component and the compressor.

7. Replace the governor or air line from the governor onto

the compressor. If the governor is direct mounted onto

the mounting pad of the compressor, install the governor

gasket (9) between the mounting pad and the governor.

8. Connect the discharge air line to the discharge port on

the top of the head.

9. Connect the inlet and outlet water lines to the head and

refill the radiator.

CHECK FOR COMPRESSOR OPERATION

1. Start the engine and observe the system pressure

gauge to ensure the compressor is pumping. Observe

that the compressor unloads (stops pumping) at the

governor cut-out setting.

2. Make several light brake applications until the governor

cut-in setting is reached. Observe that the compressor

again begins to pump.

COMPRESSOR TESTING

Vehicles manufactured after the effective date of FMVSS

121, with the minimum required reservoir volume, must have

a compressor capable of raising air system pressure from

85-100 psi in 25 seconds or less. This test is performed

with the engine operating at maximum recommended

governed speed. The vehicle manufacturer must certify this

performance on new vehicles with appropriate allowances

for air systems with greater than the minimum required

reservoir volume.

wrench,

AIR LEAKAGE TESTS

Leakage past the discharge valve can be detected as follows:

Remove the discharge line and cylinder head from the

compressor and apply shop air back through the discharge

port. Coat the discharge valve seat with soapsuds. Bubble

leakage is permitted.

The unloader piston can be checked for leakage as follows:

Build up the air system to governor cut-out and shut off the

engine. Listen for escaping air at the compressor intake.

To pinpoint leakage, apply a small amount of oil around the

unloader piston. No leakage is permitted. Apply oil or soap

solution around the threads of the unloader stop assembly

on the top of the head.