11 - 4
Auxiliary Pump (High-flow machines)
Dismantling and Assembly
Note:
Before removing and dismantling the pump, check flow
and pressure. If either of these is low, renewal of
components such as gears, bearings and housings will not
effect a permanent cure. If the pump output is satisfactory
but there is external leakage, the pump may be removed and
dismantled for re-sealing only.
The numerical sequence shown on the illustration is intended
as a guide to dismantling.
For assembly the sequence should be reversed.
When Dismantling
Mark housings and covers to ensure correct re-assembly.
Keep bearing blocks
6
,
8
,
16
,
18
and gears
4
,
5
,
14
and
15
together in sets to ensure refitting of the bearing blocks in
their original positions.
Extended bush
A
in bearing block
6
is a light push fit in
flange
2
.
DO NOT remove plug
B
as it is an interference fit, assembled
to a critical dimension.
Inspection
Wash all components then apply hydraulic oil immediately
afterwards to prevent moisture from collecting.
It is normal for the gears to have cut a slight track in the body
bore on the inlet side. The gear track wear cannot be
measured accurately but will be related to bearing wear.
Examine the bores of the bearing blocks
6
,
8
,
16
and
18
which are coated during manufacture with PTFE. If the grey
PTFE is worn through so that the bronze base is visible, the
complete pump must be renewed.
Renew pump if faces of bearing blocks are scored or if side
faces of gears are chipped or damaged. DO NOT use any
abrasives on the bearing blocks or gears as this would
destroy critical manufacturing dimensions.
When Assembling
Renew all seals. Hold them in position with grease during
assembly. Ensure that the ends of seals
7
,
9
,
17
and
19
do
not overhang the bearing blocks to become trapped in the
housings.
Bearings must be assembled with cast recesses (not seal
grooves) against gear faces and with seal ends towards the
inlet side of the pump.
Lightly lubricate threads of bolts
1
and finger tighten only.
Hold flange
2
in a vice and apply a force of 200-250 N (45-55
lbf) to body
3
at position indicated by arrow
X
(within 10 mm
[0.4 in] of the flange). Whilst maintaining this force, torque
tighten bolts
1
in a diagonal sequence. This procedure is
necessary to ensure metal to metal contact between front
bearing lobes and inlet side of body.
Torque tighten bolts
1
to 61 - 68 Nm (45 - 50 lbf ft, 6.2 - 7.0
kgf m).
If the inlet adapters are disturbed, fit new ‘O’ rings and
tighten to 115 - 145 Nm (85 - 107 lbf ft, 11.7 - 14.8 kgf m). Do
not overtighten.
Section E
Hydraulics
9803/8500
Section E
11 - 4
Issue 2*
Pumps
*
Summary of Contents for ROBOT 150
Page 2: ......
Page 21: ...5 2 Safety Decals cont d Section 2 Care and Safety 9803 8500 Section 2 5 2 Issue 2...
Page 77: ...Attachments Section A Section A 7 7 9803 8500 Issue 1 Backhoe...
Page 97: ...4 3 Section C Electrics 9803 8500 Section C 4 3 Issue 1 Alternator S213570...
Page 123: ...1 1 Section D Controls 9803 8500 Section D 1 1 Issue 1 Safety Restraint Bar S168160 1...
Page 125: ...2 1 Section D Controls 9803 8500 Section D 2 1 Issue 1 Throttle Controls S168150D...
Page 142: ...Hydraulics 9803 8500 Issue 1 4 1 4 1 Descriptions Section E Section E...
Page 145: ...Hydraulics 9803 8500 Issue 2 5 2 5 2 Descriptions Section E Section E...
Page 146: ...Hydraulics 9803 8500 Issue 2 5 3 5 3 Descriptions Section E Section E...
Page 149: ...Hydraulics 9803 8500 Issue 2 5 6 5 6 Descriptions Section E Section E...
Page 152: ...Hydraulics 9803 8500 Issue 1 5 9 5 9 Descriptions Section E Section E...
Page 163: ...10 1 Section E Hydraulics 9803 8500 Section E 10 1 Issue 1 Pumps 168150...
Page 165: ...10 3 Section E Hydraulics 9803 8500 Section E 10 3 Issue 1 Pumps 168030...
Page 167: ...10 5 Section E Hydraulics 9803 8500 Section E 10 5 Issue 1 Pumps 168160...
Page 175: ...11 1 Section E Hydraulics 9803 8500 Section E 11 1 Issue 2 Pumps 167750...
Page 179: ...13 1 Section E Hydraulics 9803 8500 Section E 13 1 Issue 1 Drive Motors 167720 S167720A...
Page 183: ...13 5 Section E Hydraulics 9803 8500 Section E 13 5 Issue 1 Drive Motors S243720 X X S243870...
Page 212: ...18 1 Section E Hydraulics 9803 8500 Section E 18 1 Issue 2 Valves S204980 X X 3 B A 4 2 1 5...
Page 215: ...20 1 Section E Hydraulics 9803 8500 Section E 20 1 Issue 1 Servo Joysticks S167960...
Page 217: ...20 3 Section E Hydraulics 9803 8500 Section E 20 3 Issue 1 Servo Joysticks 167950...
Page 221: ...23 3 Section E Hydraulics 9803 8500 Section E 23 3 Issue 1 Rams S167800...
Page 241: ...1 2 Section F Transmission 9803 8500 Section F 1 2 Issue 2 Tyres and Wheels 167861 167811...
Page 243: ...1 4 Section F Transmission 9803 8500 Section F 1 4 Issue 2 Tyres and Wheels 167851...
Page 253: ...2 1 Section K Engine 9803 8500 Section K 2 1 Issue 1 Removal and Replacement S167990...