Stanley 07530 Instruction And Service Manual page 17

O R I G I N A L I N S T R U C T I O N
HYDRAULIC PISTON
Remove Tail Jaw Cylinder 6 as described earlier.
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Grip Body 19 in vice using soft jaws* to avoid damage, undo Stroke Limiter 17.
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Grip Barrel 25 in soft jaw vice, pull Body 19 from Barrel 25 (a small quantity of hydraulic oil will be ejected from inside
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body).
Remove Piston 18 carefully so as not to damage body bore.
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Remove Seal 3.
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Seal 1 is difficult to remove without damaging, but can remain in place during cleaning (provided it is not affected by
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cleaning process). If however, Seal 1 requires renewing proceed as follows:
• Using spatula*, prise out Seal 1 from Body 19, taking care not to damage body cavity and bores. The removed Seal 1
MUST be discarded.
• To replace Seal 1, unscrew Hydraulic Hose Assembly 22 and fit a spare Bleed Plug Assembly 2 screwing it in to bring
inside face level with internal bore.
• Unscrew existing bleed plug until inside face is level with internal bore. This will provide a smooth passage for insertion
of new Seal 1 through rear of body.
• Ensure the seal is well greased and the correct way round with the open end of the seal facing the rear tail jaws.
• Complete assembly in reverse order of dismantling.
TRIGGER ASSEMBLY
• To dismantle/service assembly, remove covers from the tool as described earlier.
• Disconnect all air hoses from assembly, taking care not to damage them. Remove assembly.
Using a spanner*, unscrew the Retainer 49 and remove. Take care to keep the Spring 50.
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Prise off the 'O' Ring 53 taking care not to damage the Spindle 54 and Retainer 49 seatings.
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Clean and re-assemble using a new 'O' Ring 53.
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Check length of Spring 50 which must be 12.7mm (0.5") free length – replace if necessary.
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• Assembly in reverse order of dismantling.
TAIL JAW ON/OFF VALVE
• The unit is designed so that minimum of servicing is required during the life of the tool.
• If it is necessary to dismantle valve, proceed as follows:
• Disconnect air hose from assembly, taking care not to damage them. Remove assembly.
• Using an Allen Key*, loosen Screw 27 clamping assembly to Barrel 25 and remove assembly.
• Using a screwdriver*, carefully remove the Chrome Star-lock Washer 26 from Air Tail Jaw Spool 29 and discard washer.
• Extract Air Tail Jaw Spool 29 from Switch Block 28.
• Taking care not to damage the Air Tail Jaw Spool 29, remove the 'O' Rings 31.
• Clean spool and refit new 'O' Rings 31 using assembly bullet* and insert into Switch Block 28, noting its orientation.
• Fit New Chrome Star-lock Washer 26 by clamping in vice using a soft jaw vice to prevent damage. DO NOT USE UNDUE
FORCE.
• Complete assembly in reverse order of dismantling.
TAIL JAW PRESSURE NON-RETURN VALVE
The Non-return Valve 21 is located in the tool handle.
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To remove/replace the Non-return Valve 21 depress the bulk head fittings and withdraw the Blue Plastic Tube 23 from
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both ends.
• When replacing the Non-return Valve 21, note the orientation.
* Refers to items included in the 0753 Mkll service kit. For complete list see page 15.
Item numbers in bold refer to the general assemblies and parts lists on pages 22-23.
E N G L I S H
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