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XL-AA20023TS-en-US Rev A · 2019-04-04 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Troubleshooting Guide
Symptom:
No air flow through regulator
Problem:
Air system valve, located at regulator, is closed. Pressure protection
valve is installed backwards. The regulator could also be leaking.
Solution:
Make sure the air system valve is open as illustrated
(Figure 1)
.
Make sure the flow arrow on the pressure protection valve
is pointing in the correct direction, correct as necessary.
If the regulator is damaged and leaking air replace with
recommended regulator.
Symptom:
Hose leaking at valve stem or hubcap connection.
Problem:
Hose fittings need to be tightened or hose fittings have been
over tightened.
Solution:
Hand tighten fittings. No wrenches are necessary. Check fitting
and o-rings for damage. Replace o-rings/hose as necessary.
Symptom:
Water in hubcap.
Problem:
Potential problems for this symptom are: Hubcap oil plug
loose or damaged, hubcap gasket missing or damaged,
condensation, axle vent mounted too close to road surface,
axle airline fittings loose or not sealed, axle vent fitting loose
or not sealed.
Solution:
Make sure the hubcap oil plug is pushed into hubcap properly.
Replace oil plug if damaged. Install new hubcap gasket if the
gasket is missing or damaged. Check for system air leaks per
the procedure in warning light on. Repair leaks as required.
Check axle vent fitting and re-install as necessary.
Regulator
Setting (psi)
Valve Pressure
Switch Pressure
(psi)
Control Light
Pressure Switch
(psi)
80
70
70
85
70
70
90
80
80
95
80
80
100
90
90
105
90
90
110
90
100
115
90
100
120
90
100
Symptom:
Tire Pressure Low or Flat.
Problem:
The system has an air leak which could include a hole in the
braided tire hose or a hole in the tire.
Solution:
Refer to the section about the warning light on to identify
the location of a system leak. Replace the tire hose if it is the
cause. Repair the tire if it is the source.
Symptom:
Warning light does not come on when system pressure is low.
Problem:
Pressure switch is defective or the pressure switch improperly sized.
Solution:
Replace with the recommended Pressure Switch. Verify that
the pressure switch is the correct pressure setting by reading
the switch setting on the side of the pressure switch body.
For example PMF-80F is an 80 psi pressure switch.
Refer to the chart below for the correct pressure switch
setting based on your regulator setting.
