Hydraulic Adapter Identification
Learn to identify hydraulic adapter types and thread standards for repairs and modifications.
No model-specific guides available yet.
General guide below applies to all models.
Hydraulic Adapter Identification Guide
Hydraulic systems use various thread types and fitting styles. Correct identification prevents leaks and damage from mismatched components.
Tools Required:
Safety Notes
- • Cross-threading damages fittings
- • Wrong fitting type will leak or fail
General Steps:
Common thread types: NPT (tapered pipe), JIC (37° flare), ORB (O-ring boss), BSPP (British parallel).
NPT threads seal on the threads themselves and require sealant tape or compound.
JIC fittings seal on a 37° metal-to-metal cone - no sealant needed.
ORB fittings seal with an O-ring in a machined groove.
Use thread pitch gauge and calipers to identify unknown fittings.
Measure thread OD and count threads per inch for identification.
Chinese equipment often uses metric threads - measure in millimeters.
When in doubt, bring old fitting to hydraulic shop for matching.