Milnor 7272TG1L, Installation And Service

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Felt Seal Inspection and Maintenance
PELLERIN MILNOR CORPORATION
BIPD6M03 (Published) Book specs- Dates: 20070205 / 20070205 / 20070205 Lang: ENG01 Applic: PD6
Felt Seal Inspection and Maintenance
Milnor
®
50040xxx, 6458xxxx, and 7272xxxx dryers in current production use two felt seals and a
Nomex
®
flap seal where the rotating basket front ring meets the stationary shell front. These seals
help to retain heat and prevent goods from squeezing between the basket and the shell front.
WARNING 1 : Explosion hazard —If the basket seals deteriorate or spread apart, goods can
become caught between the basket and shell front or get sucked into the blower wheel causing
blower to fail and expel metal fragments at high speed. Bystanders can be struck.
• Ensure seals are functioning properly through regular inspection and maintenance.
• Do not indiscriminently change the basket tracking adjustment.
Various drawings showing the seals and how to work with them are provided. These drawings are
longitudinal sections through the bottom of the basket, at the location indicated in
Figure 1 .
Figure 1: Dryer Components Pertinent To This Work
Dryer—Access Panels Removed, Load/discharge Doors Blocked Open Legend
.
1. Basket front ring
2. Shell front
3. Guide rollers (control
basket front-to-rear
position)
4. Basket drive components
5. Where section views in
this document occur.
1.
Inspecting the Seals and Selecting Replacement Seals
WARNING 2 : Burn and Crush hazards —Hot goods and machine surfaces within a
recently operated dryer can cause serious burns on contact. The turning basket or shifting
goods can crush body parts. The machine can start unexpectedly if not externally
disconnected from power. The weight of goods or a person can cause the basket to turn.
• Do not service machine unless qualified and authorized.
• Unload goods, lockout/tagout power at the external disconnect switch, block the doors
open, mechanically restrain the drive chain to prevent basket rotation, ventilate and
illuminate the dryer interior before entering the basket.
• Lockout/tagout power at the external disconnect before accessing guide rollers.
• Never place fingers in the basket-to-shell front gap. Use only tools.
1. With the dryer empty of goods, prepare for safe entry as follows:
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