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Danfoss T-420 Crimp machine operator´s manual  December 2022

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Operating instructions 

Spacer ring and nominal crimp 

diameter measurement

Spacer ring

Typical spacer ring illustrating 

both sides of ring

Nominal crimp diameter 

measurement

Measuring crimp diameters 

should be a part of the normal 

hose assembly procedure. 

To ensure a proper crimp 

diameter reading, follow these 

steps:
1.  Measure the diameter in 

the middle of the crimped 

portion of the hose end.

2.  Place the caliper in a 

position to allow for a 

measurement across the 

pressed (flat) portion of the 

crimp.

3.  See crimp diameters in 

crimp specifications. 

Maintenance

Collet assembly lubrication

  

Every 30 crimps  

= Re-lubricate sliding surfaces of dies

 

Every 250 crimps  

=  Remove old grease and re-lubricate

Base adapter ring lubrication

 

Every 250 crimps  

= Remove old grease and re-lubricate

 

Every 1,000 crimps  

=  Remove old grease, inspect for  

wear or damage and re-lubricate  

if okay.

Flat side

Counterbore side

  Refer to safety information regarding Danfoss hose,  

hose fittings, and assembly compatibility on page 2. 

Summary of Contents for T-420

Page 1: ......

Page 2: ...P WORK AREA CLEAN Cluttered areas and benches invite accidents 13 DO NOT OPERATE WITHOUT THE BASE ADAPTER RING IN PLACE Safety instructions T 420 Crimp machine WARNING Danfoss s hose and Danfoss hose...

Page 3: ...amp fused circuit Pump wired for 220 volts single phase T 421U 110 Electric pump 110 volt For dimensional data other than voltage information refer to T 421U see above T 421U 110CSA CSA approved Note...

Page 4: ...4 The T 421U Electric Pump mounts on the right side of the cabinet Predrilled holes align the pump Insert bolts through top of cabinet Washers and nuts are installed from underneath Tighten STEP 5 Rem...

Page 5: ...1U power unit on mounting surface to the right and slightly behind the T 420 1 press 5 Mark mounting hole location for power unit and drill holes in mounting surface 6 Replace power unit and align hol...

Page 6: ...power cord into 220 volt 60 cycle single phase outlet It is recommended that the pump be on an individual 15 amp fused electrical circuit If using T 421U 110 pump plug power cord into 110 volt 60 cycl...

Page 7: ...t and pusher halves will open Remove factory quality crimped hose assembly and visually inspect 6 To ensure a proper crimp has been completed measure the nominal crimp diameter as shown in figure on p...

Page 8: ...mped portion of the hose end 2 Place the caliper in a position to allow for a measurement across the pressed flat portion of the crimp 3 See crimp diameters in crimp specifications Maintenance Collet...

Page 9: ...rom bottoming Remove 3 8 NPTF plug from port above check valve and install 6000 PSI pressure gauge With 6000 PSI pressure gauge in place operate unit to full crimping position Gauge should read 4000 4...

Page 10: ...crimp pressure blows fuse Pump unload valve stuck shut Replace pump Motor runs Pusher advances but doesn t develop final crimp pressure Relief valve leaking Shuttle valve leaking Relief valve set low...

Page 11: ...lb T 420 LA Light assembly T 420 LS Light switch T 420 P Pusher set 2 with wear plates and screws T 420 S Press shroud with decals T 420 26 Insert base plate T 420 G Linkage assembly T 420 2R Rack T 4...

Page 12: ...y on orderprovided that such alterations can be made without subsequent changes being necessary in specifications already agreed All trademarks in this material are property of the respective companie...

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