Manitowoc Grove RT880E User Manual

Grove Published 11-10-2014, Control # 524-00 2-9
RT880E SERVICE MANUAL HYDRAULIC SYSTEM
2
SUPPLY PRESSURE AND RETURN CIRCUIT
The supply pressure and return circuit is made up of several
circuits which route hydraulic oil from the hydraulic pumps to
the directional control valves for the individual operating
circuits. The supply pressure and return circuit consists of
the reservoir and integral filter, two hydraulic pumps, a
hydraulic oil cooler, and a 14-port hydraulic swivel. Refer to
Hydraulic Pumps, page 2-13 for descriptions and
maintenance instructions for each hydraulic pump. Refer to
Swing System, page 6-1 for description and maintenance
instructions for the 14-port hydraulic swivel.
The supply pressure and return circuit uses Ports 6 and 7 for
pump supply and the dual Port 4 for return. Each operating
circuit’s description and components begin with the circuit’s
directional control valve.
Hydraulic Reservoir
The reservoir (see Figure 2-3), attached to the right side of
the carrier frame, has a capacity of 253.3 gallons (958.7 l)
total, 228 gal (863.8 l) to the full mark. The all-steel reservoir
has an internally mounted full-flow filter and integral baffles
that help cool the hydraulic oil and prevent hydraulic oil
foaming.
Hydraulic oil flows through two tubes at the lower rear of the
reservoir to the two hydraulic pumps. Almost all of the return
flow goes through the filter at the top of the reservoir. The
return line that goes directly into the reservoir (instead of
through the filter) is from the No. 10 port (drain) of the 14-port
swivel.
A magnetized drain plug in the bottom of the reservoir
collects metal particles from the hydraulic oil if it becomes
contaminated.
A sight gauge is located on the front of the reservoir to
indicate hydraulic oil level.
Item Description
1 Return Filter
2 Filter Indicator
3 Sight Gauge
4 Return Line
5 Suction Line
6 Access Cover
7 Filler Neck and Breather
8 Step Assembly
9 Magnetic Plug
10 Capscrew
11 Flatwasher
12 Spring Lockwasher
13 Hex Nut
14 Temperature Switch (High
Hydraulic Oil Temperature)
15 Temperature Switch (Oil Cooler
Fan Motor Speed)
9
8
3
2
10
1
4
6
5
7
6
6644-1
FIGURE 2-3
11
12
13
11
14
15

Manitowoc Grove RT880E Specifications

General

Brand	Manitowoc
Model	Grove RT880E
Category	Construction Equipment
Language	English