Schaerer 7300 - Motor Pump Output Check Valve Removal; Installation

SECTION IV
MAINTENANCE / SERVICE
4.28 Motor Pump Output Check Valve
Removal / Installation
A. Removal
DANGER
Table is very heavy. Use an assistant
to lay table onto its side. Failure to do
so could result in serious personal injury.
(1) Lay table onto its left side.
(2) Remove six screws (1, Figure 4-48) and main
cover (2) from base weldment (3).
(3) Remove plug (1, Figure 4-49) from manifold (2).
(4) Using a long, thin needle nosed pliers, unscrew
guide shaft (3) and remove spring (4), washer
(5), nylon washer (6), and check valve (7) from
manifold (2).
B. Installation
(1) Clean all metal components with degreasing
solution and allow to air dry. Flush out manifold
(2, Figure 4-49) using clean oil.
(2) Install nylon washer (6) and washer (5) on check
valve (7).
(3) Install assembled check valve (7) and spring (4)
in manifold (2) and secure with guide shaft (3).
CAUTION
Make sure guide shaft bottoms out. Fail-
ure to do so will result in improper func-
tioning of check valve. However, do not use exces-
sive force on guide shaft to prevent damaging
components.
(4) Using a long, thin needle nosed pliers, screw
guide shaft (3) inward until it bottoms out in
manifold (2); then unscrew guide shaft two full
turns.
(5) Install plug (1) in manifold (2).
(6) Install main cover (2, Figure 4-48) on base
weldment (3) and secure with six screws (1).
(7) Raise table to its upright position.
Page 4-47Printed in U.S.A.
Figure 4-48. Motor Pump Access
Figure 4-49. Motor Pump Output Check
Valve Removal / Installation
CA818000
3
2
1
CA818100
7
6
5
4
1
3
2
© Schaerer Mayfield USA, Inc. 2004