Logic Cartridge Valves (Fig. 62)
CAUTION
CAUTION
Use eye protection such as goggles when using
compressed air.
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components.
4.
Clean logic cartridge valve (10) using clean mineral
spirits. Submerge valve in clean mineral spirits to flush
out contamination. Particles as fine as talcum powder
can affect the operation of high pressure hydraulic
valves. Use compressed air for cleaning.
1.
Remove logic cartridge valve (10) and seal kit (9).
Visually inspect the port in the manifold (27) for
2.
damage to the sealing surfaces, damaged threads, and
contamination.
5. Reinstall logic cartridge valve (10):
A. Lubricate new O--ring and backup ring of seal kit
(9) with clean hydraulic oil and install. The O--ring
and backup ring must be arranged properly on the
cartridge valve for proper operation and sealing.
3.
aged sealing surfaces and contamination.
Visually inspect logic cartridge valve (10) for dam-
A. Contamination may cause valves to stick or
hang up, it can become lodged in small valve ori-
fices or seal areas causing malfunction.
B. Thread cartridge valve carefully into the port
(LC1).Thevalveshouldgoineasilywithoutbinding.
Torque the valve to 35 ft--lb (47 N--m).
B. If sealing surfaces appear pitted or damaged,
the hydraulic system may be overheating or there
may be water in the system.
Hydraulic System (Rev. I)
Page 4 -- 98
Greensmaster 3250--D
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