Malabar 795 - Troubleshooting and Support Resources; Special Tools and Spare Parts

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3. While operating the hand pump, adjust set screw (figure 3, item 9) until the thermal relief valve by-
passes hydraulic fluid back to the reservoir at 120.0 to 125.0 tons.
4. Replace plug (figure 3, item 8). Once more operate hand pump to verify correct setting.
5. Open release valve to relieve pressure.
If adjustment is required for the jack system relief valve, perform the following procedure:
1. Remove plug (figure 3, item 8) to expose system relief valve. Close release valve (figure 3, item 2).
2. Place jack in a load indicating test fixture. Make sure the test adapter is 1 1/4 inch female spherical
radius. Operate hand pump to extend plunger against the test adapter.
3. While operating the hand pump, adjust set screw (figure 3, item 9) until the system relief valve by-
passes hydraulic fluid back to the reservoir at 105.0 to 110.0 tons.
4. Replace plug (figure 3, item 8). Once more operate hand pump to verify correct setting.
5. Open release valve to relieve pressure.
If adjustment is required for the hydraulic caster relief valves (if so equipped), perform the following
procedure:
1. Remove plug (figure 11, item 12) to expose relief valve. Close release valve (figure 11, item 6).
2. Remove plug (figure 11, item 33) and install a 0-1000 psig test gauge.
3. Operate the hydraulic caster hand pump (figure 11, item 17) to fully extend caster. Continue to
operate hand pump until the relief valve by-passes hydraulic fluid back to the reservoir at 900 ± 20
psig (63.3 ± 1.4 kg/sq cm).
4. Replace plug (figure 11, item 12). Once more operate hand pump to verify correct setting.
5. Open release valve to relieve pressure, remove test gauge and replace plug (figure 11, item 33).
6. Repeat for other hydraulic casters.
SPECIAL TOOLS:
The following special tools are necessary to disassemble/reassemble the cylinder assembly, the hydraulic
casters (if so equipped) and the shock absorber assembly (if so equipped). These tools may be
purchased upon request:
Part No. Description Qty
79588 Spanner wrench, retaining nut---------------------------------------------------------------------- 1
490-028 Spanner wrench, hydraulic caster cap------------------------------------------------------------ 1
78957 Lifting tool, extension screw ------------------------------------------------------------------------- 1
79589 Lifting tool, plunger ------------------------------------------------------------------------------------- 1
78956 Lifting tool, tripod head-------------------------------------------------------------------------------- 1
78955 Lifting tool, cylinder
------------------------------------------------------------------------------------- 1
872845 Accumulator test gauge assembly, 0-300 psig------------------------------------------------- 1
RECOMMENDED SPARE PARTS:
The following spare parts are recommended and available upon request.
Part No. Description Qty
Standard Spare Parts
795PK Repair parts kit ------------------------------------------------------------------------------------------ 1
56010-1 Valve block assembly --------------------------------------------------------------------------------- 1
79366 Release valve knob
------------------------------------------------------------------------------------ 1
79365 Release valve stem ------------------------------------------------------------------------------------ 1
65228 Release valve lockscrew ----------------------------------------------------------------------------- 1
55155 Safety pop-off valve assembly---------------------------------------------------------------------- 2
79571-1 Hand pump assembly
--------------------------------------------------------------------------------- 1
55762-7 Pump handle--------------------------------------------------------------------------------------------- 1
76347 Reservoir gasket---------------------------------------------------------------------------------------- 1
79562 Filler cap with dipstick --------------------------------------------------------------------------------- 1
424-005 Drain cock valve
---------------------------------------------------------------------------------------- 1
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