Dixon Valve 100 TON RAM Complete Manual - Manual (Page 4)

100 Ton Ram Instruction Manual
Holedall Concept 2
Listed below are a few guidelines for correct swaging procedures:
1. Always measure (with a diameter tape) the hose free O.D. Both ends of the hose must be measured.
Free O.D. is outside diameter before stem is inserted.
2. For hoses having a wall thickness of 5/16" or greater, chamfer hose tube at 45° angle by 1/8" wide.
This is done prior to stem insertion and will help eliminate the hose end from flaring when the stem is
fully inserted.
3. Select the correct ferrule from the die and ferrule chart by using the combination of hose I.D. and free O.D.
Ferrule must be able to slip over stem and hose without removing (skiving or buffing) hose cover.
4. Select a die (from die and ferrule chart) based upon the free O.D. measured for the end to be swaged to
effect a 18% to 24% reduction.
5. For standard length stems and ferrules, swage is complete when the pusher face meets the die face.
For long length stems and ferrules, effect as long a swage as possible. (See footnote on next page)
6. Apply a high viscosity lubricant (grease or oil) to ferrule O.D. and die I.D. before initiating swage.
Crisco works best for most swaging procedures.
7. Inspect (visually) the completed swage of coupling, both external and internal where possible.
Troubleshooting: Listed below are some troubles that may occur and their causes:
Trouble
1. Ferrule cracks
2. Hose cover bulge behind ferrule
3. Hose tube bulge (internal bulge)
4. Ferrule bulges or collapses at top portion
5. Buckling or collapsing of coupling stem
Trouble may occur which is related to the hose design and manufacture. For good coupling application and
performance, it is essential that hose manufacturers be concerned with the requirements for good coupling
retention. Tensile strength, elasticity, durometer hardness, cold flow characteristics and adhesion of hose
components all effect coupling performance.
Causes
1. Too small a ferrule size
2. Too small a die selection
1. Too small a ferrule size
2. Too small a die selection
1. Too small a ferrule size
2. Too small a die selection
1. Too small a ferrule size
2. Too small a die selection
3. Length of swage too long
4. Ferrule and stem not in proper
position when swage was initiated
1. Too small a ferrule size
2. Too small a die selection