Checking Oil; Disassembling The Gas Section - Haskel Q-Drive QGD Series Installation, Operation And Maintenance Manual

2. Attach a flow meter to the Blow By port at the rear of the system. See "Attaching Air, Gas, and
Coolant Lines."
3. If the meter detects flow above 700 SCCM (cm³/min), plan to replace the piston seal set.
4. Remove the flow meter before starting the system.

Checking Oil

The motor housing has 2 sight glasses through which you can view the oil level. When the system is
not running, you are can see the oil level in both glasses.
If the oil level is not sufficient, add more oil. See "Adding New Oil."

Disassembling the Gas Section

Tools:

Hytorc® torque gun or any wrench with 200 ft-lbs (271 Nm).

Krytox 240AZ lubricant
CAUTION: Do not allow any metal to touch the inner surface of the gas barrel. Any
scratch can cause immediate leaks after re assembly. The barrel might need to be re
honed.
Heavy Objects! Two Person lift required
Hot Surfaces! The tubes can be hot, allow to cool down before servicing.
1. Disconnect the tubing from the inlet and the outlet check valves.
2. Cap all the open ports to prevent contamination.
3. Loosen the Tie Rods on the Actuator, but do not remove. Use the same sequence as for
tightening to loosen Tie Rods, but in increments of 100 ft-lbs (135 Nm).
4. Remove the Retainer Plate. Supporting the Retainer Plate is Gas Section leveling screw.
Ensure to loosen the screws before removing the Gas Sections. When re-assembling Gas
Sections, be sure to position leveling screw back to starting position. Typical to count and
record rotations when loosening.
5. Loosen the Check Valves from the End Caps, but do not remove.
6. Remove the End Caps. Use a rubber Mallet if necessary.
7. To remove the Piston, insert the 10-32 screw into the Piston center-threaded hole and hand-
tighten. Use the screw to pull the Piston out.
8. Never allow any hard metal material to touch the inner surface of the Gas Barrel. This can
cause immediate leaks after reassembly. If Barrel is scratched, honing may have to be done.
You can now inspect, clean, and, if necessary, replace the components of the gas section.
Q-Drive Installation, Operation, and Maintenance Manual
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