Hydraulic System - Function And Adjustments; Safety Instructions; Hydraulic Oil - Kesla proG 20 Manual

7. HYDRAULIC SYSTEM – FUNCTION AND ADJUSTMENTS

7.1. SAFETY INSTRUCTIONS

7.2. HYDRAULIC OIL

GRAPPLES – USER MANUAL
Hydraulic pressure measurement and adjustment must only be
performed by a person familiar with hydraulics.
When working at the grapple be careful of the lowering crane.
Keep unauthorised persons away from the controls. RISK OF AN
ACCIDENT!
Be careful when measuring pressure because of the high
pressure in the hydraulic system. Ruptured hoses, leakage and
opening of connectors can cause serious injuries because of oil
spraying out.
Always before any maintenance engine must be stopped, power
switched off and hydraulic system pressure-free
Remember cleanliness also when handling pressure gauge and
measuring connectors.
A mineral-based hydraulic oil is suitable for grapple use.
Check the pertinent ISO classification (ISO32 or ISO46) according
to the conditions and instructions given by manufacturer of the
base machine.
Current bio-degradable oils are unsuitable for use in Kesla
grapples.
Continuous high temperature of the hydraulic oil prematurely ages
the seals of the grapple.
Check the oil level daily!
The hydraulic oil should qualify cleanliness class 18/16/13 ISO
4406 or cleaner.
Oil temperature must be between -20 ... +70 ˚C (-4 ... +158 ˚F)
Oil viscosity must be 20 - 50 cSt during normal operation (15 –
2000 cSt at start-up)
The hydraulic oil must not contain water.
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