BLACKMER NGH1013, Installation, Operation And Maintenance Instructions

Page: 28 / 32

TROUBLESHOOTING
CB6A-210 page 28/32
PROBLEM STEP
PROBABLE CAUSE
WHAT TO CHECK
IF PROBLEM
STILL EXISTS
GO TO STEP ...
Low
Transfer
Rate
1
4-Way Valve Leaking
(when equipped) Lubricate with a stick lubricant compatible
with material being transferred.
2
2 Worn or Broken Piston Rings
Check condition of rings by restricting
discharge line. If pressure increases
slowly, rings are probably faulty.
3
3 Plugged Strainer Clean screen as necessary. 4
4 Compressor Valve Faulty
Remove and inspect for broken or worn
springs, discs, or bodies. See "Valve
Replacement".
5
5 Compressor Drive Slipping
Tighten belts, check for sheared keys,
loose keys or loose flywheel.
6
6
Piping Improperly Designed
or Installed
Use proper pipe sizes. 7
No
Flow
7 Excess Flow Valves Slugged
Stop the compressor to let the excess flow
open. Installation of a valved bypass line
between the suction and discharge lines
may be necessary.
3& 4
Knocks or
Other
Noises
8 Loose Valves Tighten valve hold-down screws. 9
9 Worn Internal Parts
Inspect through inspection plates and
repair as necessary.
4
No Oil
Pressure
10
Oil Pump Relief Valve Not
Properly Set.
Set oil pump relief valve. 11
11 Oil Pump Not Working
Check the Oil Pump drive tab or stop pin
for damage.
12
12 Low Oil Level Check and fill as necessary 13
13 Dirty Oil Inlet Strainer Clean Inlet Strainer
Gas
Leaking
from
Crankcase
Breather
14 Faulty/Worn Packing Replace Packing. 15
15 Piston Rod Scored
Replace crosshead assemblies and
packing.
16
16 Improper Seal Arrangement See "Seal (Packing) Replacement." ---
Relief
Valve
Actuates
17
Valve Closed Downstream of
the Compressor
Open Valve 18
18
Line Blockage Downstream
of the Compressor
Locate Blockage and Correct ---
Shake
or
Vibration
19
Loose/Broken Mounting or
Anchor Bolts
See “Mounting the Compressor Unit“ 20
20 Improper Mounting
Ensure base is supported full length. See
"Mounting the Compressor."
21
21
Improperly Aligned V-belt
Sheaves
See "V-Belt Drives" 22
22
Improperly Installed
Flywheel
See "Compressor Flywheel" 23
23 Nonfunctioning Valves Replace or repair valves. ---