Schaerer 7300 - Lateral Tilt Pilot Operated Check Valve Removal; Installation

SECTION IV
MAINTENANCE / SERVICE
4.14 Lateral Tilt Pilot Operated Check
Valves Removal / Installation
A. Removal
(1) Remove four plugs (1, Figure 4-18), four screws
(2), and back section table top (3) from R.H. and
L.H. side weldments (4).
(2) Bend lip of two cover gaskets (5) and remove
four screws (6).
(3) Remove bridge cover (7) and two cover gaskets
(5) from R.H. and L.H. side weldments (4).
(4) Cover distribution board (1, Figure 4-19) with rag
to protect it from oil.
NOTE
Procedure to remove / install either pilot operated
check valve is the same, with exception of an
additional step for base input pilot operated check
valve. The additional step is included in this proce-
dure.
Also, illustration shows removal / installation of both
pilot operated check valves. Follow portion of art that
applies.
(5) Remove large plug (2) from manifold (3).
(6) If removing pilot operated check valve which
affects input to rod end of lateral tilt cylinder,
remove small plug (A) from manifold (3); then
proceed to step 8.
(7) If removing pilot operated check valve which
affects input to base of lateral tilt cylinder,
perform the following steps before proceeding to
step 8:
a. Disconnect tube (B) from swivel fitting (C).
b. Remove fitting connector (D), fitting seal (E),
and disconnect tube (B) from manifold (3).
(8) Using a long, thin needle nosed pliers, unscrew
guide shaft (4) and remove spring (5), washer
(6), nylon washer (7), and check valve (8) from
manifold (3).
(9) Using a small punch or Allen wrench, push pilot
piston (9) out of manifold (3).
(10) Remove spring (10) from manifold (3).
B. Installation
(1) Clean all metal components with degreasing
solution and allow to air dry. Flush out manifold
(3, Figure 4-19) using clean oil.
(2) Install nylon washer (7) and washer (6) on check
valve (8).
(3) Install assembled check valve (8) and spring (5)
in manifold (3) and secure with guide shaft (4).
CAUTION
Make sure guide shaft bottoms out. Fail-
ure to do so will result in improper func-
tioning of check valve. However, use caution as
using excessive force on guide shaft will damage
components.
Page 4-18Printed in U.S.A.
Figure 4-18. Covers Removal / Installation
CA807200
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© Schaerer Mayfield USA, Inc. 2004