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DUSTHOG PNP Series
5. Service
Before servicing equipment:
• Wear appropriate protective equipment when servicing dust collector.
• Disconnect and lockout electrical power to the unit.
• Shut off and lock out compressed air supply to the unit. Relieve the pressure inside the unit,
and verify with a pressure gauge known to be in working order.
Table 4 - Maintenance Schedule
Task
Check Dust Bin Level
Check For Accumulated Material
Verify Pulse Valve Func onality
*Add to this list and adjust the maintenance interval as necessary based on applica on.
5.1 General Maintenance Guidelines
Proper maintenance of the PNP is essential for the unit to provide excellent dust/fume collection
capabilities and long-term service. By keeping the unit well-maintained, you will also reduce operating
and parts replacement costs. A scheduled preventive maintenance program, specifically designed for
the PNP and its associated components, is the best possible method to assure the unit stays in proper
working order.
Refer to Section 6 for troubleshooting guide to correct any problems that may occur with your dust
collection unit. If the problem or condition continues, contact Parker customer service for assistance.
5.2 Primary Filter Installation/Replacement
Always wear proper PPE including goggles, dust mask and work gloves when installing or replacing filter
elements. Dust accumulated on the filter elements can result in irritation of the lungs, skin, and / or eyes.
When the primary filters reach the point of not being able to maintain proper unit function they must
be replaced. Remove used filter elements from the collector and dispose of properly, in accordance with
local codes and regulations. Be sure there is no excessive dust or residue build-up inside the primary filter
cabinet. Contaminant can accumulate in various locations including, but not limited to, the tubesheet,
dust drawer ledges, dust drawer (outside dust bin), pulse cabinet, and tops of filters. Clean as necessary.
Inspect all filter sealing cam bars and filter support parts for unusual signs of wear or failure. Checking of
all gaskets and seals is recommended at this time, as well as replacement if necessary.
The surface of the filter element can be damaged as a result of improper moving or handling, care must
be taken to prevent any damage to the filter media.
Inspect filters to verify there is no damage and all packing materials have been removed. The number of
filters required is determined by the unit size as stated in the nomenclature section. The same quantity is
required for both the primary cartridge filters and after-filters. Reference balloon #1 in Figure 4.
Slide the filter assembly onto the cam-bar and into the cabinet while the cam-bar is in the lowered
position (both handles down) until the filter bottoms out on a stop. Reference balloon #2 in Figure 4.
Rotate the cam-bars upward as illustrated to push the filter up and seal it against the tube sheet.
Reference balloon #3 in Figure 4.
Maintenance Interval
Weekly (increased frequency may be necessary)
Monthly (or when filters are replaced or bin emp ed)
Quarterly
C A U T I O N
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