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

CAUTION: 

The above pumps have the pressure relief valve 

set at 4,000 - 4,200 PSI, Damage to the press may result and 

warranty may be voided if higher pressures are used.

Specifications and equipment

T-420 Crimp machine and accessories

T-420 Crimp machine

The T-420 is a versatile machine ideal for your shop, 

factory, construction, and mine locations. Large 

capacity combined with lever-activated crimping gives 

you wide coverage and a quick and simple way to 

make factory-quality hose assemblies. The T-420 press 

offers crimping capabilities through 1-1/4”. I.D. four 

spiral hose.

Weight  

210 lbs.

Size 

22”high, 20-1/2”deep, 10”wide

T-421U Electric pump

 

(220 volt) 

T-421UCSA CSA approved

Dimensions 

7½” high, 10” wide, 22” long

Weight 

75 lbs.

Pressure 

4000-4200 psi

Reservoir capacity 

6 Quarts

Outlet port size 

¾-16 Straight thread

Motor 

 1HP, 3450 RPM, 220 volts, 60 cycle, 

Single Phase

Hydraulic oil 

ISO 32 (SAE 10W)

Flow 

 2.5 GPM to 750 psi. 0.5 GPM above 

4000 psi

*For low temperature applications automatic transmission fluid  
can be substituted.
Note: It is recommended that the electric pump be used on a  
15 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: It is recommended that the electric pump be used on an  
individual 30 amp. fused circuit. Pump wired for 100 volts, single phase

Pump kit part numbers

ET420-007 

110 volt electric pump kit with hose assembly

ET420-007CSA 

110 volt electric pump kit with hose assembly,  

CSA approved

ET420-008 

220 volt electric pump kit with hose assembly

ET420-008CSA 

220 volt electric pump kit with hose assembly,  

CSA approved

Crimp machine part numbers

T-420-1 

Base T-420 machine

T-420-1CSA

 

Base T-420 machine, CSA approved 

 

Crimp machine and tooling package part numbers

T-420-001

 

Contains T-420 crimper, 220v pump kit, 

T420TP-1001 tooling package

T-420-002

 

Contains T-420 crimper, 110v pump kit,  

T420TP-1001 tooling package

T-420-001CSA

 

Contains T-420 crimper, 220v pump kit,  

T420TP-1001 tooling package, CSA approved

T-420-002CSA

 

Contains T-420 crimper, 110v pump kit,  

T420TP-1001 tooling package, CSA approved

 

Crimp machine and tooling package part numbers

T420TP-1001

 

New placement tooling package 

Capabilities: Braided -4 thru -20, Spiral -8 thru -20

T420TP-1002

 

Winner tooling package 

Capabilities: Braided -4 thru -20, Spiral -6 thru -20

*both packages exclude -5 and -10 sizes

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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