Curtis OL 512 - Manual (Page 31)

CAP-215
18
Instruction Manual Oil-Less Compressors
4.5.
CHANGING THE VALVES OF THE 1
ST
STAGE
The intake valve of the 1st stage is integrated into the top part of the piston. The pressure valve is fitted
between valve head and cylinder.
Changing the pressure valve
Change pressure valve of 1st stage according to
chapter 4.6.
Changing the Intake valve
- Loosen two cap nuts from tube connectors
and remove inter-cooler and after-cooler.
- Remove counter-sunk screw (1) together with
fixation nut (2) from piston head.
- Remove plate valve (3).
Fig. 14: valve head 1st stage
4.6. CHANGING
2
ND
STAGE VALVES AND VALVES OF 1ST STAGE PRESSURE VALVE
Intake and pressure valves of the 2nd stage are
combined in one plate valve under the valve
head.
- Loosen two cap nuts from tube connectors
and remove inter-cooler and after-cooler.
- Remove four allen screws (5), together with
washer (6) from valve head (1). Remove valve
head.
- Remove gasket (2) and plate valve (3).
- When reinstalling valve check for right position.
Countersunk screw heads have to be at the top.
Fig. 15: valve head 2nd stage