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PartsTable / COMPONENT / 684834R91
684834R91 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include material: STEEL BODY, bore_type: STRAIGHT, port_style: INVERTED FLARE SINGLE PORT, bore_diameter: 1.625 INCHES NOMINAL IN, overall_width: 2.125 INCHES NOMINAL IN, overall_height: 2.812 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2530-00-846-2783, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
684834R91
NSN: 2530-00-846-2783
FSC: 2530
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialSTEEL BODY
bore_typeSTRAIGHT
port_styleINVERTED FLARE SINGLE PORT
bore_diameter1.625 INCHES NOMINAL IN
overall_width2.125 INCHES NOMINAL IN
overall_height2.812 INCHES NOMINAL IN
extended_length9.500 INCHES NOMINAL IN
compressed_length8.625 INCHES NOMINAL IN
features_providedRUBBER BOOT
mounting_positionRIGHT
port_thread_class2B SINGLE PORT
seat_angle_in_deg12.0 SINGLE PORT
NSN2530-00-846-2783
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CYLINDER ASSEMBLY,HYDRAULIC BRAK TITLE COMPONENT PN 684834R91 MFR CYLINDER ASSEMBLY,HYDR
KEY FEATURES
•
MOUNTING FACILITY THREAD QUANTITY PER INCH: 20
•
MOUNTING PROVISION ARRANGEMENT STYLE: TWO HOLE
•
DESIGN CHARACTERISTICS: SINGLE ACTING SINGLE CYLINDER
•
PORT THREAD DIAMETER: 0.375 INCHES NOMINAL SINGLE PORT IN
•
FIRST PISTON ROD END STYLE: SLOT TYPE ALL WORKING ENDS
•
MOUNTING TYPE AND LOCATION: FLANGE CENTER SECTION
•
FIRST END FORK DEPTH: 0.375 INCHES NOMINAL ALL WORKING ENDS IN
•
BLEEDING FEATURE QUANTITY: 1
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING FACILITY THREAD QUANTITY PER INCH20
MOUNTING PROVISION ARRANGEMENT STYLETWO HOLE
DESIGN CHARACTERISTICSSINGLE ACTING SINGLE CYLINDER
PORT THREAD DIAMETER0.375 INCHES NOMINAL SINGLE PORT IN
FIRST PISTON ROD END STYLESLOT TYPE ALL WORKING ENDS
MOUNTING TYPE AND LOCATIONFLANGE CENTER SECTION
FIRST END FORK DEPTH0.375 INCHES NOMINAL ALL WORKING ENDS IN
BLEEDING FEATURE QUANTITY1
FEATURES PROVIDEDRUBBER BOOT
EXTENDED LENGTH9.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
20156-DPC32Interchangeable
interchangeable cross-reference
interchangeable
4578-F,PC 28Interchangeable
interchangeable cross-reference
interchangeable
23720-3PC19Interchangeable
interchangeable cross-reference
interchangeable
3338Interchangeable
interchangeable cross-reference
interchangeable
J72-0118-3Interchangeable
interchangeable cross-reference
interchangeable
125119Interchangeable
Screw,machine 2-56
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 684834R91?
684834R91 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK.
What parts can replace 684834R91?
There are 19 known substitutes for 684834R91: 20156-DPC32, 4578-F,PC 28, 23720-3PC19 and 16 more. Substitute compatibility should be verified for your specific system.
Is 684834R91 still available?
684834R91 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026