Service - Graco B Series Instructions Manual

Servicing
If the unit requires more than installation of a service
kit, it is usually quicker and least expensive to send the
unit in for repair.
WARNING
D To prevent explosive hazard do not drive this air
motor with combustible gases. Injury and/or
property damage can result.
D Do not use kerosene or other combustible
solvents.
D Eye protection is required.
D Keep face away from exhaust port and do not
flush unit with flammable solvent.
D Foreign material exiting the air motor can be
hazardous.
CAUTION
Do not drive the air motor in excess of the recom-
mended speeds.
Flushing
If the motor is sluggish or inefficient, try flushing with
solvent.
The recommended solvent for air motors and lubri-
cated pumps is Gast Flushing Solvent, Gast Part No.
AH255 or AH255A, Loctite Safety Solvent, or Inhibisol
Safety Solvent.
1. To flush a unit, disconnect air line and muffler (E).
2. Add several teaspoons or spray solvent directly
into the motor.
3. Rotate the shaft by hand in both directions for a
few minutes.
4. Reconnect the air line and slowly apply pressure
until there is no trace of solvent in the exhaust air.
5. Flush the unit in a well ventilated area.
6. Re-lubricate the motor with a squirt of oil in the
chamber.
6 306426

Service

NOTE: If the vanes need replacing or foreign material
is present in the motor chamber, an experienced me-
chanic may remove the end plate opposite the drive
shaft end. Do not pry with a screwdriver. It will dent the
surface of the plate and body, causing leaks.
A puller tool should be used which will remove the end
plate while maintaining the position of the shaft. New
vanes should have the edge with the corners cut on
angle or the notched edge (if reversible) toward the
bottom of the vane slot.
NOTE: If the air motor still doesn't operate properly,
contact a Graco distributor. Do not try to repair the air
motor yourself.
C
1
D
E
4
2
18
Fig. 2
F
19
10
KEY
C Oiler Screws
D Air Inlet 3/8 npt(m)
E Muffler
F Lubricate bearing here
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