CVR Performance Vacuum Pumps Instructions
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A Division of Clay Valley Racing Inc.
P/N VP655 8: VP665
Parts List
4’ —3/8” vacuum hose 4 — 74’ Lock Washers
1 - Vacuum Pump Assembly 4 — 7 Nuts
4 - Vi x 1” SHCS 8 — % Flat Washers
Electric Vacuum Pump Instructions
These instructions are a basic guideline for installing a Vacuum Pump. This pump comes with a
built-in factory set vacuum switch.
Installation
Unit can be mounted in any position.
Electrical Installation
The BLUE wire on the supplied wiring harness goes to +12VDC 30AMP min. or direct to battery. The
BLACK wire to chassis ground or —12VDC. The YELLOW wire is ignition switch positive and has a
low amperage draw and can be connected directly to the ignition switch with power on when ignition
switch is in run position. This connection must be ignition switched power so that when the motor is
switched off the vacuum pump is off.
Vacuum Circuit
A supplied hose is used to connect the vacuum pump intake nozzle to the brake vacuum booster or
servo unit. Please refer to enclosed drawing.
Troubleshooting
If pump keeps cycling — possible vacuum leak — remove hose from vacuum circuit, use supplied hose,
plug other end of hose, pump should cycle and turn off. If pump shuts off then look at other issues with
lines, reservoir (if used) or brake booster. This will help you in isolating the problem.
Possible Cause: Vacuum leak in hose or vacuum booster itself.
Replace defective items and reinstall.
Customers in higher altitudes may require an adjustment of the vacuum switch when the pump does
not shut off.
CAUTION: Adjusting this switch does not increase vacuum output — it will only effect the turn
on and turn off set point. A vacuum gauge must be used when adjusting this switch. Over
adjusting of the switch could cause damage to internal components.
On the back of the vacuum switch there is a 1/8” Allen plug — remove it. Behind the plug is a 1/8”
adjustment screw. Using a 1/8” Allen key, turn the screw clockwise to decrease the vacuum set point
and counterclockwise to increase the vacuum set point.
Thank you for purchasing a CVR product!
|
OPTIONAL
VACUUM RESERVOIR
BLACK SIDE TOWARDS
INTAKE VACUUM
INTAKE VACUUM — CHECK VALVE
TEE =
| |
O
[| [1 =D
jr IEA
y BRAKE BOOSTER
| Dain
= “Ca VACUUM PUMP
5 > PNT |
BLACK: TO GROUND RED: TO 12V 30AMP MIN.
OR DIRECT TO BATTERY
YELLOW: TO 12V WHEN KEY ON
LOW LOAD .7 AMP E
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