c. DO NOT OIL POT BEARING
Oil leakage into the resistance element will cause poor wiper contact.
6. VACUUM PUMP MAINTENANCE
Ordinarily the vacuum pump assembly should require no maintenance except
oiling which is explained below. However, if the pump should stop working
properly, do not disassemble it, since proper assembly is rather difficult.
First check all hose couplings for leakage, then try flushing with carbon
tetrachloride or similar solvent. To flush, remove the hose from the intake
oil bottle, and, with the pump running, apply solvent to the intake with an eye
dropper. If the pump still does not operate, please arrange to have the pump
returned to the factory for repair.
WICK IN DOWN POSITION WICK IN UP POSITION
STARTING CAPACITORS
EXHAUST COLLECT
WICK
Vacuum Pump and Motor
Fig. 16
Oiling: Note the two oil bottles mounted on the vacuum pump assembly. The
one with the wick introduces a fine oil mist to the pump, and the other collects
the used oil.
Before operating pump, fill intake bottle with oil to about 1/2 inch from the
bottom. Do not use an oil with additives. Use a pure oil not heavier than
S. A. E. 10. We recommend Shell "Cornea Oil 15", which can be purchased
from any Shell distributor. A small bottle of this oil is supplied with each re-
corder.
34 |
ACEC
HEWLETT-PACKARD
