Labrie Pendpac WITTKE RETRO FL, Operator'S Manual

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Operating the W
ITTKE
R
ETRO
F
L
TM
73
Regular oil changes are vital to the longevity of hydraulic system components. Operational
performance, load and environmental conditions are variables that determine the frequency of
hydraulic oil changes.
N
OTE
:
We recommend that the hydraulic oil be replaced every 1000 hours. Following the failure of
any major hydraulic component, the oil should be filtered through an external filtration
system capable of cleaning the oil to a contamination level equivalent to ISO 4406 18/15/13.
Oil Identification
An identification decal, located on the hydraulic tank, specifies the manufacturer’s brand and
viscosity of hydraulic oil provided with your W
ITTKE
R
ETRO
F
L
TM
. When oil replacement becomes
necessary, other equivalent oil types can be substituted, provided they meet the existing oil’s
specifications. These specifications are listed below:
Š
Viscosity, cSt @ 40°C 32
Š
Viscosity, cSt @ 100°C 5.5
Š
Viscosity, SUS @ 100°F 171
Š
Viscosity, SUS @ 210°F 45
Š
Viscosity Index 100
Š
Pour Point, °F -33
Hydraulic Reservoir
Your W
ITTKE
R
ETRO
F
L
TM
is equipped with an aluminum hydraulic reservoir with a capacity of 55
gallons. It is baffled internally to separate the inlet from the outlet in order to allow entrained air to
escape. The aluminum construction helps for heat dissipation. The reservoir oil volume changes as
hydraulic functions are operated. To compensate for the volume change, air either enters or is
expelled through the breather cap. On full eject units, the breather cap is located on the front
bulkhead and is attached to the reservoir via a hydraulic line. The breather maintains 5 psi of air
pressure in the reservoir at all times once the oil heats up. Air pressure above 5 psi is expelled into the
atmosphere. The positive tank pressure helps push oil into the hydraulic pump inlet to prevent
cavitation.
A ball valve is provided on the 2-1/2” diameter reservoir inlet line for maintenance purposes.
Caution!
Always remove the breather cap and filler cap slowly to let the internal air pressure
dissipate in order to avoid serious injury.