5
Checking the Tool For Proper Expansion
Prior to attaching the air hose — and with the expander head attached
to the tool — grasp the expander head segments and spin them.
They should spin with ease. This indicates that the oil reservoir is not
filled to excess. If the reservoir is over filled, the segments will bind.
Once the air hose is attached, slide a piece of tubing onto the
expander head. Press the trigger and hold in the expanded position.
All the segments should press against the inside of the expander
head retaining nut. No gap should be apparent. This indicates that
the oil reservoir is full.
If there is a gap between the head segments and the expander head
retaining ring, add a small amount of oil to the reservoir.
Refer to Figure 3-1 for tool parts referenced in this section.
Removing the Cylinder Cap from the Air Cylinder Housing
For proper operation, the air cylinder housing must be airtight. However,
this can dry the cap gasket and make removal difficult. To remove the
cylinder cap from the air cylinder housing, follow these steps.
1. Mount the tool upside down (as illustrated) in a vice to hold in
place. Ensure the top (chrome) of the tool is level to prevent air
bubbles from becoming trapped in the tool.
2. Use a piece of cloth or cardboard to protect the tool’s finish.
3. Use the provided hexagonal wrench to remove the cylinder cap
by inserting the large end of the wrench in the rectangular slot
on the cap.
4. Remove the cap by applying slow, constant force to the wrench.
Filling the Oil Reservoir
1. To remove any trapped air bubbles, grasp the center piston nut with
a pair of pliers and move the piston up and down three to four times.
2. Remove the entire piston assembly by grasping the center piston
nut with a pair of pliers and pulling the assembly straight out.
3. After the piston is removed, fill the oil reservoir with 30-weight oil
to the top of the oil reservoir nut. Oil should never enter the air
cylinder housing.
4. Replace piston assembly.
5. Replace the bottom plate. Hand-tighten the plate first and use the
wrench for the last ¹⁄₄ to ¹⁄₂ turn.
