Vermeer Navigator D7 11 Series User Manual

D7x11 Series II Navigator Directional Drill Supplemental Operations 55-15
PORTABLE BREAKOUT SYSTEM CHAIN - PERIODIC INSPECTION
Appearance and/or Symptoms Probable Cause Correction
Excessive Length (Elongation) Normal wear Replace chain.
Permanent deformation (stretch) from
overload.
Replace chain and correct cause of overload.
Abnormal Protrusion
of Pins
Overloading Replace chain and correct cause of overload.
Inadequate lubrication Replace chain and improve lubrication.
Side loading Replace chain, correct cause of side loading.
Cracked Plates
(fatigue)
Overloading Replace chain and correct cause of overload.
Side loading Replace chain and correct cause of side load.
Arc-Like Cracked Plates
(Stress Corrosion)
Severe rusting or exposure to acidic or
caustic medium, plus static stress at
press fit between pin and plate.
Replace chain and protect from hostile
environment.
Enlarged Holes
Overloading Replace chain and correct cause of overload.
Cracked Plates
(Corrosion Fatigue)
Perpendicular to Pitch
Line, plus rust or other
evidence of chemical corrosion
Corrosive environment
Replace chain and protect from hostile
environment.
12.3″ /ft (31 cm/m)

Vermeer Navigator D7 11 Series Specifications

General

Brand	Vermeer
Model	Navigator D7 11 Series
Category	Drill
Language	English