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©HALE PRODUCTS, INC. Our policy is one of continuous development. We therefore
reserve the right to amend specifications without notice or obligation.
12V: 538-1910-10-0
24V: 538-1910-00-0
The clutch solenoid is normally closed.
When all of the interlock conditions are
met the solenoid opens and allows air to
engage the clutch.
• Clutch is not engaging
o Clutch solenoid has failed
o Solenoid not receiving signal
o Inadequate air supply
o Interlocks are enabled.
o Incorrect Solenoid is installed
(Voltage or Normally Open)
Clutch needle valve controls the
engagement speed of the clutch by
controlling the amount of air going to the
clutch. Closing the needle valve slows
engagement, while opening the needle
valve speeds engagement.
• Clutch is not engaging
o Clutch solenoid has failed
o Inadequate air supply
o Needle valve not set correctly.
o Interlocks are enabled.
See “CAFS – Hot Shift Clutch
Engagement” on page 91.
This air manifold is used as an inlet from
the truck air. It supplies air to the Master
Drain, Tank-to-Pump, and clutch.
Problems with Master Drain, Tank-to-
Pump, and Clutch can be from:
• Dirty Strainer
• Leaks in Manifold
• No air from truck
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