Service - Stanley CS11 Service Manual

Good maintenance practice keeps the tool on the job
and increase its service life.
The most important maintenance practice is to keep the
hydraulic fluid clean at all times. Contami nated hydraulic
fluid causes rapid wear and/or failure of internal parts.
Follow the procedure contained in the HYDRAU LIC
SYSTEM REQUIREMENT section of this manual to en-
sure peak performance from the tool.
Never disassemble the tool unless proper trouble-
shooting procedures have isolated the problem to an in-
ternal part. Disassemble it only to the extent necessary
to replace the defective part. KEEP CONTAMINANTS
SUCH AS DIRT AND GRIT AWAY FROM INTERNAL
PARTS AT ALL TIMES.
Always determine and correct the cause of the problem
prior to assembly. Further wear and tool failure can re-
sult if the original cause is not cor rected.
PRIOR TO ASSEMBLY
Clean exterior of the tool.
Obtain the seal kit (Part Number 21443 or 21444) so all
seals exposed during disassembly can be re placed dur-
ing assembly.
Ensure that all seals that were exposed have been re-
placed with new parts.
Apply clean grease or O-ring lubrication to all parts dur-
ing reassembly.
NOTE:
For orientation of parts identified in the following
procedures, see the parts list exploded view illus-
tration at the back of this manual.
1. Check all parts for evidence of excessive wear, scor-
ing, or obvious damage. Pay particular attention to
seal and other running surfaces, look ing for scratch-
es or other signs of fluid contami nation caused de-
fects. Dirty or water contami nated fluid can cause
scratches on running com ponent surfaces.
2. Examine all exposed seals and O-rings for worn
spots or damage caused by overheating or inges-
tion of contaminants. Although all exposed O-rings
and seals must be replaced during assembly of the
unit, this inspection should be performed to help
identify related faulty components and the cause of
an experienced or potential malfunction.
3. All components exhibiting excessive wear or deep
scratches can usually be touched up using an em-
ery cloth.
Thoroughly clean all parts before assembly.
4. Apply clean grease or O-ring lubricant to all close
fitting parts and seals during assembly.
ON-OFF VALVE DISASSEMBLY AND
REASSEMBLY
DISASSEMBLY
1. Drive out the 1/4-inch roll pin securing the trigger
to the valve handle assembly. Depress the safety
catch and remove the triggers through the bottom of
the valve handle.
NOTE:
It is not always necessary to drive the roll pins com-
pletely out of valve handle to allow re moval of parts.
The safety catch can be removed at this time by
driving out the 3/16-inch roll pin with a 5 mm diam-
eter punch. It is not necessary to re move the safety
catch to service the On/Off valve.
2. Remove the valve cap from the top of the handle.
Remove the O-ring from valve cap bore.
3. Pull the On/Off valve out through the top of the valve
handle.
4. Remove the port plug from the bottom of the valve
handle. The coil spring will drop out in your hand.
5. Clean and inspect the valve and its bore in the han-
dle carefully. The valve and bore should have a pol-
ished appearance without scoring or deep scratch-
es. Excessive wear indicates contaminated oil in the
system.
REASSEMBLY
1. Lubricate and install the O-ring in the valve cap bore.
2. Push the valve cap onto the valve stem, then thread
the assembly into the top of the valve handle as-
sembly.
3. Install the coil spring and the port plug into the bot-
tom of the valve handle.
NOTE:
Open and Closed Center valves are inter changeable.
4. Replace the safety catch (if removed previ ously).
Place the torsion spring on the boss of the safety
catch with the spring tab on the top of and facing
the back of the catch as shown in the parts list il-
lustration.
5. Place the safety catch in the valve handle and align
the holes using a 3/16 inch/5 mm diameter punch.
6. Install the 3/16 × 1-3/8 inch roll pin.

SERVICE

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