Sealey CT955.V2 Instructions

Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS AND CAUTIONS.
USE THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE
AND/OR PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. PLEASE KEEP INSTRUCTIONS SAFE FOR FUTURE USE.
1. SAFETY INSTRUCTIONS
WARNING! Ensure all Health & Safety, local authority

and general workshop practice regulations are strictly
adhered to when using tools.
DO NOT use equipment if damaged.

Maintain the equipment in good and clean condition for

best and safest performance.
If required, ensure vehicle to be worked on is

adequately supported with axle stands, ramps and
chocks.
Wear approved eye protection. A full range of personal

safety equipment is available from your Sealey dealer.
Wear suitable clothing to avoid snagging. DO NOT

wear jewellery and tie back long hair.
Account for all tools and equipment being used and DO

NOT leave them in, on or near engine.
When not in use, place in protective case and store in

a safe, dry, childproof area.
IMPORTANT: Always refer to the vehicle

manufacturer's service instructions, or a proprietary
manual, to establish the current procedure and data.
These instructions are provided as a guide only.
WARNING! The warnings, cautions and instructions referred to in this manual cannot cover all possible

conditions and situations that may occur. It must be understood that common sense and caution are
factors which cannot be built into this product, but must be applied by the operator.
2. INTRODUCTION
2.1 Introduction
Compression tester fitted with a
Ø63mm gauge reading up to 300psi
and 20kg/cm². Kit includes 130mm
straight and angled push-on
connectors, 400mm flexible
extension with 10, 12, 14 and
18mm adaptors. Supplied in
carry-case.
3. OPERATION
3.1 Test Procedure
WARNING! Always release the pressure via the Release Valve before disconnecting the tester.

Press the release valve slowly to release the pressure gradually. Refer to Fig.1.
NOTE! A variation in compression readings between cylinders is often a better indication of engine problems
than the absolute values of compression.
3.2 Run the engine until it reaches the normal operating temperature.
3.3 Stop the engine and disconnect all spark plug wires, numbering them according to the cylinder to
which they were connected.
3.4 Loosen all spark plugs by about half a turn, but do not remove them.
3.5 Using an air hose or wire brush, remove all the dirt and debris from the spark plug wells.
3.6 Remove the spark plugs and place them on a clean, flat surface in the cylinder order in which they
were removed.
and properly maintained, give you years of trouble free performance.
Fig.1
INSTRUCTIONS FOR:
PETROL ENGINE COMPRESSION TESTER
MODEL: CT955.V2
RELEASE
VALVE
Fig.2
HAND
TIGHTEN
CT955.V2 Issue No: 1 - 30/09/08