OTC 4572 Manual

Caution: to prevent personal injury,
• Study, understand, and follow these instructions. if the operator cannot read English, operating
instructions and safety precautions must be read and discussed in the operator's native language.
– Si el operador no puede leer inglés, las instrucciones de operación y las precauciones de seguridad
deberán leerse y comentarse en el idioma nativo del operador.
– Si l'utilisateur ne peut lire l'anglais, les instructions et les consignes de sécurité doivent lui être
expliquées dans sa langue maternelle.
• Wear eye protection that meets anSi Z87.1 and oSHa standards.
• Spring compression creates a potentially dangerous situation because of the trapped energy. Release
the pressure on the compressor before removing the tool from the cylinder head.
1. Position a short metal tube on the spring cap – not the valve – and lightly tap the tube with a hammer. This loosens
the collets from the spring retainer and valve spring keepers.
2. If applicable, remove the clip from the valve keeper.
3. Determine which release adapter, 1 in. (25 mm) or 1-3/16 in. (30 mm), best fits the application. The adapter should
not interfere with the valve keeper. Thread the adapter onto the adjusting screw as shown. (The other adapter may be
threaded onto the other end of the screw for storage.)
4. Lock the handle on the valve spring compressor.
5. Position the compressor with the release adapter aligned squarely on the spring retaining cap, and the cup on the end
of the T-bar actuating screw pressing against the valve.
6. Tighten the T-bar handle to compress the valve spring and expose the collets.
Caution : to prevent equipment damage, if the spring cap refuses to free up and release the collets, LooSEn
tHE t-BaR until pressure is released from the spring retainer. Remove the compressor and repeat Steps 1–6.
7. Remove the collets, and loosen the T-bar handle to release pressure before removing the compressor.
Caution : to prevent personal injury, before removing the tool from the cylinder head, release pressure
on the compressor by loosening the t-bar handle.
The valve spring assembly can now be removed from the cylinder head.
T-bar Handle
&
T-bar Actuating Screw
© 2003 SPX
Rev. C November 30, 2010
Form No. 520762 Sheet 1 of 1
Valve Spring Compressor
Application : Engines with Overhead Valves
Safety Precautions
operating instructions
Release Adapter
aligned over spring retaining cap.
Handle
in locked position.
Release Adapter
adjusting
stored on end of screw.