3 - 4
COMPONENTS CX130
CASE TRAINING CENTER
AUGUST 2000
Foot control
In neutral the foot control is a closed center hydraulic valve. The inlet oil from the pilot pump is blocked at both
regulator spools (17 ). The ports (1), (2), (3), (4) are ported inside of the valve back to tank through a hole drilled
in the end, and a cross drilled hole in the regulator spool (17).
There are two springs (20) and (21) for each regulator spool (17). The larger diameter spring (21) provides the
return of the foot pedal and this spring (21) is the resistance the operator feels in his foot.
Typically the return springs are stronger in foot control than in hand control.
If the dust cover (30) under the foot control is torn, replace it. This will help prevent contamination from wearing
the U-seals (6) on the push rods (8).
The gap between the push rod (8) and the screw (28) can be adjusted. A too tight adjustment can cause partial
actuation of the spool. The contact area between the push rod (8) and the screw (28) should be lightly lubricated
with grease.
How it work
As the foot control is moved, the push rod (8) will push on both large and small diameter springs (21 & 20). The
smaller spring (20) will push the spool (17) and block of the return passage through the top meetering notches.
The bottom metering land will open a passage and allow pilot oil out to the work spool of the travel control spool.
As the travel spool moves and compresses the spring in the control valve, the pressure will increase and push up
on the bottom of the regulator spool (17). When the pressure of the oil pushing on the travel spool equals the
force of the spring (20) behind the regulator spool (17) the bottom metering land will block the pilot supply. When
the force of the spring (20) equals the force of the pressure on the spool (17), the spool (17) is in a balanced
position to maintain a proportional pressure with the compression of the spring (20).
The foot control must be moved further to compress the small spring (20) and push the regulator spool (17)
further to increase the pressure again.
The foot control is nothing more than an adjustable pressure regulator, and the operator provides adjustment .
1Body
2>Plug
3>Mounting braket
4>Bushing
5>Seal cover
6>U-seal (retainer)
7>O-ring
8>Push rod
9>Spring cup
10>Spring guide
11>Spring cup
12>Snap ring
13>Ball seat
14>Piston
15>Ball
16>Bolt
17>Regulator spool
18>Spring cup
19>Shim
20>Regulator spring
21>Spring (feel lback)
22>Spring
23>Spring
24>Bushing
25>Shaft
26>Cam
27>Bolt
28>Adjustement bolt
29>Nut
30>Rubber boot
Summary of Contents for CX130
Page 1: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000...
Page 2: ......
Page 3: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 1 GENERALE INTRODUCTION...
Page 4: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 24: ......
Page 25: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 2 COMPONENTS LAYOUT...
Page 26: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 33: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 3 COMPONENTS...
Page 34: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 37: ...COMPONENTS CX130 3 3 CASE TRAINING CENTER AUGUST 2000 Hand remote control...
Page 39: ...COMPONENTS CX130 3 5 CASE TRAINING CENTER AUGUST 2000 Foot control...
Page 41: ...COMPONENTS CX130 3 7 CASE TRAINING CENTER AUGUST 2000 Auxiliary foot control...
Page 53: ...COMPONENTS CX130 3 19 CASE TRAINING CENTER AUGUST 2000 Pump...
Page 54: ...3 20 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pump follow...
Page 55: ...COMPONENTS CX130 3 21 CASE TRAINING CENTER AUGUST 2000 Pump follow...
Page 56: ...3 22 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pump control block follow...
Page 57: ...COMPONENTS CX130 3 23 CASE TRAINING CENTER AUGUST 2000 Pump control block...
Page 58: ...3 24 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pump rotating group assembly follow...
Page 59: ...COMPONENTS CX130 3 25 CASE TRAINING CENTER AUGUST 2000 Pump rotating group assembly follow...
Page 60: ...3 26 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pilot pressure pump...
Page 61: ...COMPONENTS CX130 3 27 CASE TRAINING CENTER AUGUST 2000 Pilot pressure pump...
Page 62: ...3 28 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Proportional solenoid valve...
Page 63: ...COMPONENTS CX130 3 29 CASE TRAINING CENTER AUGUST 2000 Proportional solenoid valve...
Page 68: ...3 34 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Boom savety valve H B C V...
Page 69: ...COMPONENTS CX130 3 35 CASE TRAINING CENTER AUGUST 2000 Dipper arm savety valve H B C V...
Page 71: ...COMPONENTS CX130 3 37 CASE TRAINING CENTER AUGUST 2000...
Page 73: ...COMPONENTS CX130 3 39 CASE TRAINING CENTER AUGUST 2000...
Page 74: ...3 40 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Dual flow valve...
Page 75: ...COMPONENTS CX130 3 41 CASE TRAINING CENTER AUGUST 2000 Dual flow valve...
Page 76: ...3 42 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Swing motor...
Page 77: ...COMPONENTS CX130 3 43 CASE TRAINING CENTER AUGUST 2000 Swing motor...
Page 78: ...3 44 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Travel motor...
Page 79: ...COMPONENTS CX130 3 45 CASE TRAINING CENTER AUGUST 2000 Travel motor...
Page 80: ...3 46 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Travel motor follow...
Page 81: ...COMPONENTS CX130 3 47 CASE TRAINING CENTER AUGUST 2000 Travel motor follow...
Page 82: ...3 48 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Swivel joint...
Page 83: ...COMPONENTS CX130 3 49 CASE TRAINING CENTER AUGUST 2000 Swivel joint...
Page 84: ...3 50 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Flow restrictor...
Page 85: ...COMPONENTS CX130 3 51 CASE TRAINING CENTER AUGUST 2000 Boom cylinder...
Page 88: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 103: ...DIAGNOSTIC SELECTION 4 15 CASE TRAINING CENTER AUGUST 2000...
Page 141: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 5 ELECTRICAL...
Page 142: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 143: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 190: ......
Page 191: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 6 HYDRAULIC CIRCUIT...
Page 192: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 193: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 215: ...HYDRAULIC CIRCUIT 6 22 CASE TRAINING CENTER AUGUST 2000...
Page 219: ...HYDRAULIC CIRCUIT 6 26 CASE TRAINING CENTER AUGUST 2000 Clamshell option Multipurpose option...
Page 223: ...HYDRAULIC CIRCUIT 6 30 CASE TRAINING CENTER AUGUST 2000 PUMP CX 130 Pump engine stopped...
Page 234: ......
Page 235: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 7 SETTINGS...
Page 236: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 260: ......