Schaerer 7300 - Column Pilot Operated Check Valve Removal; Installation

SECTION IV
MAINTENANCE / SERVICE
4.21 Column Pilot Operated Check Valve
Removal / Installation
A. Removal
(1) Remove column cylinder (Refer to para 4.20).
(2) Remove large plug (1, Figure 4-36) from mani-
fold (2).
(3) Remove small plug (3) from manifold (2).
(4) 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 (2).
(5) Using a small punch or Allen wrench, push pilot
piston (9) out of manifold (2).
(6) Remove spring (10) from manifold (2).
(20) Install retainer plate (11) on column assembly
(12) and secure with two screws (10).
(21) Remove retaining bolt (M07407) from rod of
column cylinder (9).
(22) Coat two o-rings of fitting seals (8) with oil.
(23) Connect hose (7) to rod of column cylinder (9)
with two fitting seals (8) and fitting connec-
tor (6).
(24) Secure hoses together with cable ties.
(25) Secure hoses to two cable tie anchors (5) with
cable ties.
(26) Install rear bridge cover (2) on L.H. and R.H.
side weldments (4) and secure with two
screws (3).
(27) Connect spring (1) to rear bridge cover (2).
(28) Raise table to an upright position.
(29) Install two cover gaskets (5, Figure 4-32) and
bridge cover (7) on R.H. and L.H. side
weldments (4); then bend lip of cover gaskets
back and install four screws (6).
(30) Install back section table top (3) on R.H. and
L.H. side weldments (4) and secure with four
screws (2).
(31) Install four plugs (1) on back section table
top (3).
(32) Add oil to reservoir (Refer to para 4.2).
(33) Perform column cylinder slave line volume
adjustment procedure (Refer to para 4.6).
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CA7669
Figure 4-36. Column Pilot Operated Check
Valve Removal / Installation
© Schaerer Mayfield USA, Inc. 2004