Ampex 351 - Page 56

CAPSTAN DRIVE MOTOR LUBRICATION
Step 9:
Required (Limit)
Step 2:
Step 1:
Step 5:
Step 2:
Step 6:
Step 7:
Step 3:
Step 6:
6-8
Step 4:
Step 5:
Step 7: Replace the motor.
Step 8: Replace the capstan idler.
Step 3:
Step 4:
Lubrication
The following parts of the tape transport
mechanism require lubrication every three
months, or after every thousand hours of oper 
ation, whichever occurs first.
Lubricate the upper sleeve bearing of the
capstan drive motor with this oil or its equiva 
lent:
Caloil OC-11 (A mpex A udio Part No. 827),
Standard Oil Company of California, San
Francisco, California. Class “ C ”
Characteristics
Viscosity in Centi 
strokes at 130° F
Pour Point
Flash Point
Gently pry up and remove the capstan
dust cap.
Before activating the safety switch,
apply not more than four drops of
lubricant (OC-11) to the exposed
bearing surface.
Replace the capstan dust cap.
Start the drive motor by placing the
POWER switch in the ON position,
activate the safety switch and al 
low the motor to warm up (requires
about 15 minutes).
Turn off the equipment when the
warm-up period is complete.
If the bearing appears dry after the
motor has cooled, repeat the above
procedure.
Wipe the capstan dry of any excess
oil that may have been applied acci 
dentally.
Unplug the motor connector P504P
from its receptacle J504S at the con 
trol circuit box.
Remove the capstan idler by loosen 
ing the Allen head screw on the idler
arm and gently pulling the idler as 
sembly away (the capstan idler must
be removed because one of the mount 
screws is beneath it).
Support the motor in one hand and
remove the four mounting screws that
hold it to the tape transport.
Now pull the motor free.
Locate the oil hole which will be on
the top or the side of the motor end
bell.
Place not more than four drops of a
recommended lubricant in the oil
hole (OC-11).
89-0131
89-0144
Issue A
CAPSTAN IDLER LUBRICATION
Gently pry the dust cap from the wheel hub
(a knife blade can be used) and oil with not
more than 3 drops of OC-11, on the felt washer.
Failure to perform capstan idler lubrication
can result in the felt washer becoming com 
pletely dry, and a dragging idler can contribute
to flutter.
Medium turbine oil, petroleum base with in 
hibitor additives to increase oxidization and
corrosion preventive properties. Essential
characteristics are as follows :
Readjust the capstan idler pressure
if necessary (see Capstan Idler Pres 
stire).
The alternate method for drive motor lubri 
cation is:
Step 1:
CAUTION
Do not over-lubricate. Wipe off excess
oil.
CAUTION
The capstan idler must be properly
placed in relation to the tape. Thread
tape on the equipment along the pre 
scribed tape thread-path, and set the
idler so that the tape travel is centered
on the tire. Placement is not critical
and visual alignment is adequate.
40.0-48.0
25° F (Max.)
370° F (Min.) ±20° F
There are two ways to lubricate the drive
motor, the first of which requires its removal.
The second, and simpler method, does not
require removal of the motor. See alternate
method. To remove the drive motor proceed as
follows :