BENDIX BW1845 User Manual download pdf (Page 25)

Symptom: What it may indicate: What you should do:

(g) Restricted air inlet (not enough air

to compressor).

ð Check compressor air inlet line for

restrictions, brittleness, soft or sagging

hose conditions etc. Repair as necessary.

Refer to vehicle manufacturer’s guidelines

for inlet line size.

ð Check the engine air filter and service if

necessary (if possible, check the air filter

usage indicator).

(i) Compressor malfunction.

ð Replace the compressor only after making

certain that none of the preceding

conditions, 9.0 (a) through 9.0 (h), exist.

(h)Poorly filtered inlet air (poor air

quality to compressor).

ð Check for leaking, damaged or defective

compressor air inlet components (e.g.

induction line, fittings, gaskets, filter

bodies, etc.). Repair inlet components as

needed. Note: Dirt ingestion will damage

compressor and is not covered under

warranty.

9.0 Air brake

charging system

seems slow to

build pressure.

(continued)

(f) Restricted discharge line.

ð If discharge line is restricted:

ð By more than 1/16" carbon build up,

replace the discharge line (see Table A,

column 2, on page 18 for recommended

size) and go to Test 3 on page 29.

ð By other restrictions (e.g. kinks).

Replace the discharge line. See Table A,

column 2, on page 18 for recommended

size. Retest for air build. Return vehicle to

service or, if problem persists, go to 9.0(a).

ð The discharge line must maintain a

constant slope down from the compressor

to the air dryer inlet fitting to avoid low points

where ice may form and block the flow. If,

instead, ice blockages occur at the air dryer

inlet, insulation may be added here, or if

the inlet fitting is a typical 90 degree fitting,

it may be changed to a straight or 45 degree

fitting. For more information on how to help

prevent discharge line freeze-ups, see

Bendix Bulletins TCH-08-21 and

TCH-08-22 (Appendix B). Shorter

discharge line lengths or insulation may be

required in cold climates.

(f)

(g)

Kinked discharge line shown.

Dash gauges.

Partly collapsed

inlet line shown.

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BENDIX BW1845 User Manual Page 25

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