APT MHC 5, Руководство по безопасности и эксплуатации, Страница: 17 / 20

MHC 5
17 (doc no.)
SAFETY & OPERATING INSTRUCTIONS
Technical data
Troubleshooting
Solution Cause Problem
Check the performance and connection of
the power source. Make sure that the return
line coupling is completely fitted with no
clearance
Core drill not connected properly Core drill will not operate
Check the power source and ensure that the
flow and pressure are according to the
technical specifications
Oil flow and/or pressure too low
Check the power source and ensure that the
flow and pressure are according to the
technical specifications
Oil flow and/or pressure too low Core drill runs at low speed
Clean system Contaminated hydraulic system
Carefully check the O-ring seals in the trigger
valve bushing and replace damaged ones
Internal leakage
Tighten trigger valve bushing properly Untightened trigger valve bushing Core drill runs without pushing the trigger
Replace the O-ring at the bottom of the
trigger valve bushing hole
O-ring failure
Replace spring Check valve spring broken
Check the power source and ensure that the
flow and pressure are according to the
technical specifications - and that the
connections are correct
Flow too high Trigger lever stuck
Improper pressure/return line connection
Back pressure too high
Check trigger valve/reversing valve for
seizing
Impurities
Readjust the flat spring through the two
screws on the motor housing
Trigger lever blocked in locked position Trigger lever cannot be released
Reduce the flow from the power source. If
necessary, use a flow divider to control the
flow
Flow too high System overheats
Use a power source with higher cooling
capacity or add an additional oil cooler in the
return line
Insufficient cooling
Machine data
COR 5, COR 15
7 (15.4) Weight without hoses and drill bit, kg (lb)
20-30 (5-8) Oil flow range, l.p.m. (US gal/min)
160 (2300)
Maximum pressure relief valve setting, bar (psi)
C and D EHTMA category
14 (200) Maximum back pressure in return line, bar (psi)
30-70 (86-158) Oil working temperature, °C (°F)
Approx. 2 Required cooling capacity, kW
30 l.p.m. (8 US gal/min) 20 l.p.m. (5 US gal/min)
Drill bit diameter mm (in.) rpm Drill bit diameter mm (in.) rpm Type
50-100 (2-4) 900 75-202 (3-8) 600 COR 5
12-30 (0.5-1.2) 2250 25-75 (1-3) 1500 COR 15
17 3392 5192 90a | Original instructions
Safety and operating instructions COR 5, 15