Búa phá đá Caterpillar lắp trên máy đào - P5
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Caterpillar Impact Products Ltd.
Caterpillar Hammers
Test and Adjusting
for Optimum Performance
Hydraulic Circuit
Hammer
and
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
Reference of the initial hammer set
up on carrier.
Troubleshooting
Diagnostic reference point
YEKN0341 Service Record Form
HAMMER MODEL HOURS
......../......../........
MAKE SERIAL NO. WEIGHT HOURS
NOTE: ALL TESTING MUST BE DONE AT MAX. ENGINE RPM, MAX. POWER LEVEL
MAX. WORK MODE AND HYDRAULIC OIL AT WORKING TEMPERATURE.
HAMMER DA TA:
Accumulator charge (models H115 s to H180 s) bar/psi................
Low pressure accumulator charge (Models H45 to H100) bar/psi................
High pressure accumulator charge (Models h45 to H100) bar/psi................
Oil flow to the hammer (at operating pressure) lpm / gpm...........
Operating pressure at hammer inlet (Models h45 to H180 s) bar/psi................
Low pressure circuit (Models H45 to H100) bar/psi................
Pressure in the return line (back pressure) bar/psi................
Line relief valve setting (cracking pressure) bar/psi................
Main relief valve setting of the carrier bar/psi................
Hydraulic oil temperature in the tank during test °C / °F................
MACHINE DATA:
Flow regulator valve for hammer? YES NO
Oil cooler on machine? YES NO
Oil filter hammer return line? YES NO
CUSTOMER
SERVICES:
S/N location of hammer and carrier
Maintenance Procedures: daily / weekly / monthly
Correct hammer operation
Changing of tools and lower tool bushing
Hammer installation inspection
Correct storage of hammer
IMPORTANT: IF THE HAMMER IS INSTALLED ONTO ANOTHER MACHINE DURING THE WARRANTY
PERIOD, A NEW HAMMER DELIVERY RECORD MUST BE COMPLETED.
CUSTOMER
OR USER
USER'S SIGNATURE CITY
COUNTRY
DELIVERING
DEALER'S NAME CITY
DEALER
DLR REP. SIGNATURE COUNTRY
Return to closest address:
Caterpillar Impact Products Ltd Caterpillar Impact Products Ltd Caterpillar Impact Products Ltd
6 Corp Woods, 8900 Indian Creek Pky Regal Court, 42-44 High Street c/o Caterpillar Overseas SA
Suite 400, Overland Park KS 62210 Slough, Berks SL1 1EL 7 Tractor Road, Singapore 627968
USA ENGLAND SINGAPORE
NAME MAILING ADDRESS
MODEL
The following points have been discussed / demonstrated with the customer / operator:
TEST DATA
DELETE AS APPROPRIATE
MOUNTING BRACKET: CAT DLR CONNECTING HOSES: CAT DLR
TOOLS: BLUNT CHISEL MOIL OTHER TYPE.................................................
HAMMER DELIVERY
SERVICE RECORD
CARRIER
IDENTIFICATION:
INSTALLATION
INFORMATION:
APPLICATION:
QUARRY DEMOLITION TUNNELLING OTHER....................................................
DEALER CODE SERIAL NO. DELIVERY DATE
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Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
•
Pre-Delivery Inspection
• H45 - H100 Flow Test
• H45 - H100 Operating Test
• H70 Flow Graph - example
• H115s - H180s Flow Test
• H115s - h180s Operating Test
• Auxiliary Circuit Inspection
• Troubleshooting Guide
• Diagnostic Method
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Pre- Delivery Inspection
1. Check Accumulator charge.
2. Flow Test.
3. Check Operating pressure.
4. Grease tool properly.
4 Key areas :
1
2
3
4
MOLY grease
“Desert Gold”
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Accumulator Nitrogen Charge Check
3Q-7749 Seal
121-6583 Charging Group
Always Verify Accumulator Nitrogen charge during PDI
Check for leaks
Check seal is seated
Never reuse a seal
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
Hydraulic Flow Test (H45-H100)
IN
OUT
Test Purposes:
• Verify flow at operating pressure.
• Verify return line back pressure.
• Identify relief crack point.
• Identify relief setting in hammer circuit.
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
Hydraulic Operating Test
(H45 - H100)
Verify Low Pressure circuit
is set properly.
Test Purposes
:
Low Pressure
Out
Out
Test port fittings:
8T-7910 4BSPP-.56SAE
6V0405 Seal
6V3965 Nipple
8T0856 Gauge
870 psi (6000 kPa)
Caterpillar Impact Products Ltd.
Caterpillar Hammers
H45 H50
H63
H70
H90C
H100
Inlet
Outlet Low pressure test port
Operating pressure test port
Return line pressure test port
Caterpillar Impact Products Ltd.
Caterpillar Hammers
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
10 15 20 25 30 35 40
H70 on 416C Auxiliary Circuit
F
R
E
Q
E
N
C
Y
B
P
M
Oil Flow to Hammer (GPM)
H70
1000 RPM
1200 RPM
1400 RPM
1800-2300 RPM
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
• Verify flow at operating pressure.
• Verify return line back pressure.
• Identify relief crack point.
• Identify relief setting in hammer circuit.
Test Purposes:
Hydraulic Flow Test
(H115s-H180s)
OUT
IN
Back pressure gauge
8T-0849 Gauge
0-580 psi (4,000 kPa)
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
Hydraulic Operating Test
Excavator (H115s -H180s)
Verify average operating pressure to specification
Test Purposes:
Test port fittings:
8T-7910 4BSPP- 9/16 SAE
6V0405 Seal
6V3965 Nipple
8T-0859 Gauge
0-3600psi (25,000kPa)
Inlet side
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
Auxiliary Circuit Flow Test
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
0
20
40
60
80
100
Flow (gpm
)
Flow (gpm)
Flow test locates crack
point of relief valve.
Must BE greater than:
Hammer Operating Pressure +
back pressure + a “Safety” Margin.
Pressure (psi)
Relief valve START to open
Cracking Point
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
0
20
40
60
80
100
Flow (gpm
)
Flow (gpm)
Cracking Point
Pressure (psi)
Auxiliary Circuit Flow Test
Operating Pressure
Why
is this
a Problem
?
Relief valve
opens with
every blow
.
Caterpillar Impact Products Ltd.
Caterpillar Hammers
Testing and Adjusting
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
Pressure (psi)
0
20
40
60
80
100
Flow (gpm)
Flow (gpm)
Crack Point
Flow test verify the relief cracking
point is higher than the
combination of:
Hammer Operating Pressure +
Return line back pressure + a
“Safety” Margin.
Safety margin
Correct Setting
Auxiliary Circuit Flow Test
Goal
