Manitowoc Grove TMS9000-2 Series, Руководство по обслуживанию

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Grove
Published 01-14-2021 Control # 707-01
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TMS9000-2 SERVICE MANUAL HYDRAULIC SYSTEM
2
A sight gauge is located on the side of the reservoir to
indicate hydraulic oil level.
A filler cap on the top of the reservoir is for filling the
reservoir. The filler cap includes a strainer for catching
contaminants and gaskets to prevent leaking. A breather cap
(vent) is located on top of the reservoir to allow air to enter or
exhaust from the reservoir. It is most important that the
breather be kept clean to prevent damage to the reservoir.
A large access cover on the top of the reservoir provides
access for cleaning. The cover is secured to the top of the
reservoir with a band clamp and has a gasket to prevent
leaking.
The hydraulic oil filter (Figure 2-4) is located in the reservoir.
It is installed to the top of the reservoir, and its bypass outlet
is integral to the filter housing. The filter housing contains a
replaceable filter element. Returning hydraulic oil flows
through the filter head, through the filter element, and into
the reservoir.
A restriction indicator connected to the filter head indicates
the amount of filter restriction. When back pressure caused
by a dirty filter element exceeds 170 kPa (25 psi), the filter
head’s bypass feature functions to allow the hydraulic oil to
bypass the filter element and flow into the reservoir through
the bypass outlet instead.
Hydraulic Reservoir Filling Breather Filter
This element filters the air in and out of the oil reservoir as
the level changes. Remove the breather (2), (Figure 2-3) to
add oil. The breather incorporates a filter to strain the oil
when adding to the tank. The breather should be replaced
when the hydraulic oil filter is changed, 6 months or 500
hours.
Hydraulic Reservoir Thermistor and Temperature
Switch
The thermistor and temperature switch can be damaged by
over-torquing. Use the following torques when installing
these devices:
• Thermistor - 47.5 ± 4.7 Nm (35 ± 3.5 lb-ft).
• Temperature switch - 10.8 ± 2.7 Nm (8 ± 2 lb-ft).
Pump Distribution
No. 1 and 2 Pump
Pump No. 1 is a gear pump mounted to the front gear
accessory drive, it has a displacement of 39.3 cu cm (2.4 cu
in). The No. 2 hydraulic pump is driven by the engine PTO. It
is mounted to the carrier frame. The pump assembly consists
of two variable displacement piston pumps. Each variable
displacement pump has a displacement of 112 cu cm (6.83
cu in).
Pump No. 1 supplies the steering and swing. Pump No. 2
supplies the hoists, lift, telescope directional control valves,
the counterweight lift and lower, cab tilt, and telescope in and
out, and tele pinning. Hydraulic oil flowing from these valve
banks returns to the reservoir filter through dual port 1 in the
swivel.
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Reference
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