Overview

This manual deals with vacuum and pressure, how it is used in various automotive systems and how the vacuum pump can be used to test and diagnose these systems. This section discusses what vacuum is, how it is measured, where it comes from on an automobile, the system for distributing and using vacuum, and some troubleshooting basics.

DESCRIPTION

The hand-held vacuum/pressure pump is simple, accurate, easy to use, and has many applications. It consists of a pump body, moveable handle, compound vacuum/pressure gauge, vacuum/pressure converter switch, and connection fitting. The pump is easily held in your hand, and when the handle is squeezed, either vacuum or pressure is produced at the front fitting. If the front fitting of the pump is connected to a closed container or system, the gauge will show the vacuum or pressure level.

Selecting whether to have the pump produce either vacuum or pressure at the connection fitting is as simple as turning the knob located on the front left side of the pump. The vacuum/pressure valve housing is marked with "Pressure" and "Vacuum". Rotate the knob such that the arrow aligns with the desired output. Depending on the position of the knob, either vacuum or pressure is produced by squeezing the pump handle. The return of the handle has no effect on the output.

VACUUM RELEASE

The vacuum or pressure can be released by lifting up on the Release Lever. This action allows air to enter the system, thus relieving the vacuum/pressure. Vacuum/pressure will also be released when the hose is detached from the front fitting.

SPECIFICATIONS

Maximum Vacuum @ Sea Level: Approx. 25" Hg (85 kPa)

Stroke Volume: 1 cu. in. (16cc)

Gauge Accuracy: 3%-2%-3% of full range

USING THE PUMP

The pump is simple to use. In most cases, it's attached directly to a component, used in place of a vacuum line or connected into a vacuum circuit with a tee connector. The pump can be operated as a test instrument in two ways:

1) When vacuum or pressure is desired for a test, the converter switch is turned to the desired output, and the movable handle of the pump is simply squeezed with your hand, as in clenching your fist. Continue strokes until desired vacuum or pressure is indicated on the gauge.

2) The pump can be connected into a vacuum or pressure circuit and used to measure existing amounts of vacuum or pressure, just as any gauge would be used. When used this way, do not pump the handle, or incorrect readings may result.

PROPER CARE

Your pump is a sturdily built, precision test instrument. Do handle it carefully! Don’t drop or handle roughly as the gauge accuracy may be affected. Never exceed the rated pressure of the gauge, as this can cause loss of accuracy and permanent damage. Care for your pump and it will give you years of trouble-free service.

LUBRICATION

The factory-installed lubricant is silicone oil and should provide very long service. If you find it necessary to lubricate your pump, use silicone oil. If unavailable, you may use DOT 5 (not DOT 3) silicone-based brake fluid or a salad vegetable oil. Do not use petroleum based fluids or spray lubricants (WD-40, motor oil, etc.), as these will damage the pump.