McIntyre 407 - Servicing & Repair; Troubleshooting

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320/407/500/600.41912-ENG
6. Servicing & Repair
6.1. Troubleshooting
Always switch off and isolate the Shear from the mains
electrical supply before maintenance.
6.1.1. Hydraulic Fluid is getting hot
The Oil temperature Should Not exceed 65 degrees centigrade
Thepossiblereasonsforhydraulicuidgettinghotarenumerous.Thefollowingaresome
of the main causes:
A. Ensure items being processed are within the capabilities of the Shear.
B. HydraulicTankneedstoppingupwithhydraulicuid.Relltoheavyblacklineon
sight gauge.
C. Motorcoolingfanandnsneedcleaning.
D. Hydraulic Pump Suction Filter clogged. Replace with new Suction Filter.
E. Split or loose Hydraulic Hose and/or connections inside the Hydraulic Tank.
F. Hydraulic Control Valve is not moving full stroke. Check for dirt or a bent Valve
Spool.
G. Hydraulic Ram Seals need renewing. Test the Ram by bottoming out and monitoring
returnowofhydraulicuid.
H. Pumpttingcrackedorsealburst.ReplacethePump.AlsochecktheReliefValve
setting. (See Section 3.4, Page 12, for Maximum System Pressure)
Do Not set the Relief Valve to a setting above the Maximum
System Pressure for the Shear.
I. Pump bearings worn out and Pump body scored. Check Suction Filter for aluminium
lings.ReplacethePumpandSuctionFilters.