IMT Diamond Air DA435ELW, Service Manual, Page: 19 / 24

DA435ELW: 99900917: 5-3 19970508
Re-assemble as follows:
5. To hold the parts in alignment at assembly,
screw two 5/16" studs into two diagonal holes in the
rear of the bearing housing. Slide the gasket into
position, making certain the oil port hole is on the
bottom.
6. Hold the pump cover in the vertical position
with flat side on top, behind the compressor.
7. Locate the step machined at the front of the oil
pump port plate. The pump cover has 2 stop pins and
a third pin to prevent incorrect installation. Position
these three pins into the machined area.
8. While keeping the port plate in place against the
cover, rotate the outside (rotor) of pump to align the
notch with the mark for the drive pin, which was
applied previously.
9. Slide the pump into the housing and the cover
onto the studs up against the pump. Pressure from
the spring behind the pump will be noticed.
10. Using even pressure on the cover, attempt to
push the cover to make contact with bearing
housing. This process may require several attempts
with minor adjustments to align all parts.
13. Once it is possible to make contact with the
bearing housing, using hand pressure only, and there
remains spring pressure in return, hold the cover
tight against the bearing housing using one hand,
and screw in two cap screws using the other hand.
14. Do not tighten these two screws until after
removing the studs and inserting the other two cap
screws.
15. Tighten the cap screws in a criss-cross pattern
and torque to 180 in-lbs.
16. Install the air compressor in the welder. Connect
the air lines and wiring.
CAUTION
DO NOT RUN COMPRESSOR UNTIL CERTAIN
THERE IS OIL PRESSURE. DOING SO WILL
SERIOUSLY DAMAGE THE COMPRESSOR
17. Check for oil pressure by removing the 1/4" pipe
plug on the side of the pump cover. Very briefly,
start the compressor and stop immediately. If oil
does not squirt out of this hole in 1 or 2 quick tries,
the oil pump may be pinched or misaligned. If so,
repeat steps 1-9. If oil pressure is present, replace the
pipe plug as the compressor is ready to be run.
Check the compressor oil pressure gauge located on
the welder’s lower control panel. It should move
from zero to approximately 50 psi on initial start-up.
MACHINED STEP LOCATION STOP LOCATIONS