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TRAILER BRAKE CONTROL VALVE FITTING
GENERAL INSTALLATION GUIDELINES
1. NPTF fittings with pre-applied thread sealing compound
(Loctite 516 or similar) provide the best installation. Use of
paste or tape sealant is not recommended due to increased
risk of contamination.
2. Dependent on sealant type, the basic guideline for TBC
pipe fitting installation is one to two turns past finger tight.
Sealant is the variable with the greatest effect on fitting
installation. Characteristics of different sealants are as
follows:
TEFLON PIPE SEALANT
Teflon pipe sealant acts as a lubricant. Fittings go in farther
with the same torque. They may not have to go a full turn
past finger tight to seal.
FITTINGS WITHOUT SEALANT
Fittings without sealant will seal adequately in plastic ports.
They arrive at finger tight in less turns than lubricated fittings.
Unlike lubricated fittings, fittings without sealant require more
turns past finger tight to achieve a seal, typically one to two
turns.
FITTINGS WITH DRY SEALANT
Fittings with dry sealant applied become finger tight in less
turns than fittings without sealant. The dry sealant increases
the fitting size and so it starts tightening sooner. As the fitting
is wrench tightened the sealant compresses, having variable
effects on turns required to seal. Sealing still requires one to
two turns past finger tight, but more attention must be paid to
fitting torque.
3. Hand start fittings straight to prevent crossed threads.
Fittings should be started for at least one turn
before use of wrenches.
4. Dry sealants must be applied properly. If dry sealant is
applied to the first thread of a fitting, it will be hard to start
the fitting straight.
Installation Instructions
Trailer Brake Control (TBC) Valve
TRAILER BRAKE CONTROL VALVE FITTING
GENERAL INSTALLATION GUIDELINES
(continued)
5. The consistent use of one type of sealant will help you
install fittings successfully.
6. The use of teflon tape on a regular basis is not
recommended. Bits of tape break off during installation.
7. When the last thread or hex of a fitting is flush with
the surface, the fitting has been installed past the point
required to seal. Do not install the fitting farther.
Port Location
Reservoir
Control/Service
Spring Brake (Delivery)
Supply/Emergency
Commercial Vehicle Systems
Haldex Brake Products Corporation
10707 NW Airworld Drive
Kansas City, MO 64153
PH: (816) 891-2470
FX: (816) 801-4198
Haldex Limited
525 Southgate Drive, Unit 1
Guelph Ontario CANADA N1G 3W6
PH: (519) 826-7723
FX: (519) 826-9497
4/07 5M ART L31225
L31225
3/07
Port Size
Max. Torque (in-lbs)
1/2" NPTF
500
3/8" NPTF
210
3/8" NPTF
210
3/8" NPTF
210
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