Hydraulic Swivel; Description; Theory Of Operation; Maintenance - Manitowoc Grove TMS700E Service And Maintenance Manual

TMS700E SERVICE MANUAL
Item

Description

1

Hydraulic Swivel

2 Water Swivel
3 Mounting Bolts
4 Spacer Bushing
5 Setscrew
6 Nut
7 Washer
8 Slew Potentiometer
9 Electrical Swivel
10 Spacer Bushing
11 Mounting Bolt
12 Washer
13 Turntable Base Plate
14 Carrier Top Plate
15 Mounting Lugs
16 Carrier Bottom Plate
17 Frame
18 Bolt
19 Flatwasher
20 Lockwasher
21 Tubing Clamp
22 Electric Swivel Harness
23 Bolt
24 Bolt Retainer Plate
25 Hex Head Screw
26 Jam Nut
27 Frame Mounting Lugs
28 Retainer Plate
Grove

HYDRAULIC SWIVEL

Description

Each of the ports on the spool and case of the swivel is
stamped with the port number (see Table 6-1). The function
of each port is described below. The hydraulic swivel has
four grease fittings on the case. These fittings allow water
pump grease (WPG) to fill the channel in the spool and
provide a barrier to keep water out of the swivel.

Theory of Operation

The hydraulic swivel allows oil to flow from the pumps to
various crane functions on the superstructure. All oil is
routed into the spool portion of the swivel where, through a
series of internally drilled passages, oil is transferred to
circumferential channels on the spool exterior. These
channels correspond with a mating port on the outer case of
the swivel. Each channel is separated by a series of nylon
and O-ring seals that prevent transfer of oil and pressure.
Return flow from the crane superstructure is accomplished in
the same manner through another set of ports.

Maintenance

Removal
1. Extend and set the outriggers. Ensure the crane is level
and the boom is over the front.
2. Elevate the boom and note at what boom angle, you
have the most clearance between the lift cylinder and
the turntable side plate. Shut down the engine.
3. Measure the distance from the top of the lift cylinder to
the base of the boom section where the lift cylinder
attaches. Cut two pieces of 10 x 10 cm (4 x 4 in) oak to
fit.
NOTE:
Published 01-29-2015, Control # 512-01
It might be necessary to raise the boom slightly to
allow installation of the blocking.
SWING SYSTEM
6
6-15