Fluoroelastomer (Viton) Caution; Service Parts Availability; Clearance And Torque Specifications - Detroit Diesel 92 Series Service Manual

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SERIES 92 SERVICE MANUAL

FLUOROELASTOMER (VITON) CAUTION

Observe the following caution when handling fluoroelastomer.

To avoid personal injury, wear goggles or a faceplate and

neoprene or PVC gloves when handling fluoroelastomer

O-rings or seals that have been degraded by excess heat.

Make sure engine parts have cooled before handling

them. If hydrogen fluoride condensate is suspected,

wash equipment and parts well with lime water (calcium

hydroxide solution) before reusing. Discard gloves after

handling degraded fluoroelastomer.

Under normal design conditions, fluoroelastomer (Viton) parts, such as O-rings and seals,

are perfectly safe to handle. They may become hazardous, however, if these components are

subjected to temperatures above 3 l 6°C (600°F), such as during a cylinder failure or engine fire.

At temperatures above 316°C (600°F), fluoroelastomer will decompose (indicated by charring

or the appearance of a black, sticky mass) and produce hydrofluoric acid. This is extremely

corrosive and, if it contacts bare skin, it may cause severe burns, sometimes with symptoms

delayed for several hours.

SERVICE PARTS AVAILABILITY

Genuine Detroit Diesel service parts are available from authorized Detroit Diesel distributors and

service dealers throughout the world. A complete list of all distributors and dealers is available

in the World Wide Parts and Service Directory, 6SE280. This publication can be ordered from

any authorized distributor.

CLEARANCE AND TORQUE SPECIFICATIONS

Refer to section ADDIDONAL INFORMATION for a listing of new part clearances and used

part wear limits. The appropriate use of information from the limits column requires service

personnel to exercise good judgment. The wear limits recorded, in general, apply only to those

parts most frequently replaced during engine overhaul. For additional information, refer to repair

or replace in this chapter.

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