SAF Tire Pilot Plus User manual

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.
Figure 2
SAF®Tire Pilot Plus™Pressure Management System March, 2019
Troubleshooting Guide
All Trailer Axles
Refer to the link here for a troubleshooting video.
https://vimeo.com/user82815417/review/262250351/e88ebf4fc5
Symptom:
Warning Light on
Problem:
System air pressure low between 10-20 PSI of regulator
setting.
Solution:
Check for system air leaks. Connect air supply and pressurize
air tank. Open Tire Pilot Plus air system valve on the regulator
box as illustrated in Figure 1. If the leak is audible, use soapy
water to pin point the leak. If the leak is not audible, disconnect
all tire hoses from the hubcaps as illustrated in Figure 2.
If after removing tire hoses light stays on, the leak is present
between the hubcap and the air tank. Check the axle vents,
hubcap fittings, air tank fittings, pressure protection valve, and
airline external to the axle for leaking air with soapy water. If
after removing the tire hoses the light shuts off, the leak is at
the tire or tire hose. Reconnect each tire hose until the light
comes back on to pin point the leak. Once the leaking wheel
is found, use soapy water to discover the source including
wheel hoses, valve stems, rim to tire, and tire tread. Repair or
Replace leaking component as necessary or move to the next
appropriate troubleshooting section below.
Figure 1
VALVE (FOR SYSTEM
PRESSURE CHECK)
AIR SYSTEM VALVE
(SHOWN OPEN)

2XL-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
Figure 3
Symptom:
Air leaking from axle vent
Problem:
Air leak inside the axle or air leak inside the hubcap.
Solution:
Try to listen for the air leak on each side of the axle, and start
with the side that is the loudest. Relieve system pressure by
shutting off the air system valve. Relieve the system pressure at
the tire hose or hubcap. Remove the hubcap and the rotating
shaft from the hub cap and wire it to the hub using two hubcap
bolts as illustrated in Figure 3. Cap the rotating shaft end with
a 1/8" NPT cap as illustrated in Figure 3. Turn air system valve
on and allow pressure to build. Spray soapy water on the spindle
plug to rotating shaft seal. Replace spindle plug and rotating
shaft if leak is present around seal. If bubbles are present around
the two holes in the spindle plug for the vent, then the leak is
internal to the axle. Proceed with removing the spindle plug. The
spindle plug can be removed by using an appropriate size pipe
inside the hex of the spindle plug and applying force up and
down until free. Check connections and check airline. Repair or
replace as per procedures below.
Symptom:
Air leaks at spindle plug fittings.
Problem:
Fitting nut not tight, tubing cut by the fitting nut, or tubing
not pushed into the fitting far enough.
Solution:
If compression type fitting, tighten nut to 6-10 in-lbs or hand
tight plus two wrench flats if loose. For damaged tubing,
remove tubing from fitting and cut off just above leaking cut.
If damage is not present, re-insert tubing into fitting. For a
loose connection, loosen fitting nut and push tubing further
into fitting then retighten nut to 6-10 in-lbs or two wrench
flats. If push-to-connect type fitting, remove by pushing
outer ring toward fitting and pull air line free. Inspect air line
end. Recut square and push firmly into fitting until air line
bottoms out.
Symptom:
Brake air tank de-pressurized or low pressure.
Problem:
No pressure protection valve installed, defective pressure
protection valve, or leaking connection between air tank and
pressure protection valve.
Solution:
Replace pressure protection valve or dis-assemble connection,
apply pipe sealant and re-assemble with the direction of flow
arrow in the correct orientation.
Symptom:
Tire/System Pressure reading low/high
Problem:
The regulator setting could be set low or high. The system could
have an air leak. Another potential problem is insufficient air
tank pressure.
Solution:
Check the regulator setting by using a good quality digital
tire gauge to check the pressure at the valve located at the
regulator as illustrated in Figure 1. Reset regulator setting
to required pressure. Using a good quality digital tire gauge
check pressure at tank valve located adjacent to the regulator.
Pull up on the regulator knob and turn counter-clockwise until
system pressure is at least 20 psi less than desired system
pressure. While pulling up on regulator knob, slowly turn
knob clockwise until desired system pressure is achieved.
If pressure reading is greater than desired system pressure
repeat adjustment procedure above.
If the regulator setting is at the desired tire pressure, proceed
to check the system for leaks per the procedure for the
warning light on.
Verify the trailer system air tank pressure is higher than
the regulator setting. Follow procedure for Brake air tank
de-pressurized or low pressure above.
If no system leaks are found and regulator cannot be reset.
Replace regulator assembly.

3
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.

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www.safholland.com.mx
[email protected]
XL-AA20093TS-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.
From fifth wheel rebuild kits to suspension bushing repair kits,
SAF-HOLLAND Original Parts are the same quality components used in
the original component assembly.
SAF-HOLLAND Original Parts are tested and designed to provide
maximum performance and durability. Will-fits, look-alikes or, worse
yet, counterfeit parts will only limit the performance potential and
could possibly void SAF-HOLLAND’s warranty. Always be sure to spec
SAF-HOLLAND Original Parts when servicing your
SAF-HOLLAND product.
SAF-HOLLAND USA, INC.
1950 Industrial Blvd., Muskegon, MI 49443
www.safholland.com