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Quality Water Truck Systems, Tanks & Parts Since 1947
Quality Water Truck Systems, Tanks & Parts Since 1947

Hydraulics

UnitedBuilt offers a wide range of hydraulic components designed to power and support water trucks, construction equipment, and industrial systems. Our selection includes hydraulic pumps and motors, reservoirs, fittings, adapters, and flow control components built for reliable performance in demanding applications.

We stock trusted brands such as Permco hydraulic pumps and motors, Buyers Products hydraulic tanks, and Gates hydraulic fittings, along with high-quality couplings and adapters designed specifically for water truck pump systems.

Whether you’re building a new system or maintaining existing equipment, our hydraulic components are selected for durability, compatibility, and consistent performance in real-world conditions.

All products are in stock and ready for fast shipping, helping you minimize downtime and keep your equipment operating efficiently.

Hydraulics - UnitedBuilt Equipment

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  • Hydraulic Coupler 7/8" Spline 13 Tooth, (Key Sold Separately) UnitedBuilt S30636MS - UnitedBuilt Equipment
    146 in stock

    Hydraulic Coupler 7/8" Spline 13 Tooth x 1-1/8" Shaft 1/4" Key, (Key Sold Separately) UnitedBuilt S30636MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $270.00
    $270.00 - $270.00
    $270.00

    Hydraulic Coupler 7/8" Spline 13 Tooth, (Key Sold Separately) UnitedBuilt S30636MS

    $0.00 - $0.00
    $0.00
    $270.00
    $270.00 - $270.00
    $270.00
  • Hydraulic Motor Permco 1.5" Gear SAEB Bidirectional (M2100A786ADDE15-14) - UnitedBuilt Equipment
    4 in stock

    Hydraulic Motor, SAEB, 1-1/2" (1.5") Gear, 3/4" ORB, Shaft 7/8" x 13 Tooth, Bidirectional, Permco M2100A786ADDE15-14

    Permco
    $0.00 - $0.00
    $0.00
    $798.00
    $798.00 - $798.00
    $798.00

    Hydraulic Motor Bi-Directional 1-1/2" Gear 1-1/2" Gear SAEB 3/4" ORB 13 Tooth 7/8" Shaft Features & Benefits Rugged doweled construction Hig...

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    $0.00 - $0.00
    $0.00
    $798.00
    $798.00 - $798.00
    $798.00
  • Replacement Spring Mount Kit For UR35A, UR50A And UR50S Reservoirs, Buyers UR50MK - UnitedBuilt Equipment
    7 in stock

    Replacement Spring Mount Kit For UR35A, UR50A And UR50S Reservoirs, Buyers UR50MK

    Buyers
    $0.00 - $0.00
    $0.00
    $20.83
    $20.83 - $20.83
    $20.83

    Buyers Products Replacement Spring Mount Kit for UR50A and UR50S Reservoirs replaces the springs and bolts needed to mount the tanks. Mounting brac...

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    $0.00 - $0.00
    $0.00
    $20.83
    $20.83 - $20.83
    $20.83
  • Hydraulic Pump Bi-Directional, 2" Gear, SAEB, 1-1/4" ORB, Shaft 7/8" x 13-Tooth, Permco P3040A286NMZA20-14 - UnitedBuilt Equipment
    2 in stock

    Hydraulic Pump Bi-Directional, 2" Gear, SAEB, 1-1/4" ORB, Shaft 7/8" x 13-Tooth, Permco P3040A286NMZA20-14

    Permco
    $0.00 - $0.00
    $0.00
    $853.00
    $853.00 - $853.00
    $853.00

    Hydraulic Pump Bi-Directional 2" Gear 2" Gear SAEB 1-1/4" ORB 13 Tooth 7/8" Shaft Features & Benefits Rugged doweled construction High press...

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    $0.00 - $0.00
    $0.00
    $853.00
    $853.00 - $853.00
    $853.00
  • Hydraulic Adapter Bracket & Coupling UnitedBuilt B07779 - UnitedBuilt Equipment
    Save 2% Save %
    11 in stock

    Hydraulic Adapter Bracket & Coupling UnitedBuilt B07779

    UnitedBuilt Choice
    $539.00
    $539.00 - $539.00
    $539.00
    $528.22
    $528.22 - $528.22
    $528.22

    Berkeley Cast Iron Hydraulic Bracket with UnitedBuilt Coupler S30636MS and 1/4" x 1" Key, B07779 UnitedBuilt S30636MS, 7/8" Spline 13 Tooth made in...

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    $539.00
    $539.00 - $539.00
    $539.00
    $528.22
    $528.22 - $528.22
    $528.22
    Save 2% Save %
  • Hydraulic Pump Bi-Directional, 1-3/4" Gear, SAEB, 1-1/4" ORB, Shaft 7/8" x 13 Tooth, Permco P3040A286NMZA17-14 - UnitedBuilt Equipment
    7 in stock

    Hydraulic Pump Bi-Directional, 1-3/4" Gear, SAEB, 1-1/4" ORB, Shaft 7/8" x 13 Tooth, Permco P3040A286NMZA17-14

    Permco
    $0.00 - $0.00
    $0.00
    $839.00
    $839.00 - $839.00
    $839.00

    Hydraulic Pump Bi-Directional 1-3/4" Gear 1-3/4" Gear SAEB 1-1/4" ORB 13 Tooth 7/8" Shaft Features & Benefits Rugged doweled construction Hi...

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    $0.00 - $0.00
    $0.00
    $839.00
    $839.00 - $839.00
    $839.00
  • Hydraulic Tank 37 Gallon, Steel, Side Mount, Buyers SMR37SQ - UnitedBuilt Equipment
    Hydraulic Tank 37 Gallon, Steel, Side Mount, Buyers SMR37SQ - UnitedBuilt Equipment
    5 in stock

    Hydraulic Tank 37 Gallon, Steel, Side Mount, Buyers SMR37SQ

    Buyers
    $0.00 - $0.00
    $0.00
    $765.00
    $765.00 - $765.00
    $765.00

    Buyers 37 Gallon Side Mount Steel Reservoir The 37 Gallon Steel Reservoir from Buyers Products has welded, integral brackets for mounting to the tr...

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    $0.00 - $0.00
    $0.00
    $765.00
    $765.00 - $765.00
    $765.00
  • Hydraulic Tank 30 Gallon, Steel, Side Mount, Buyers SMR30S - UnitedBuilt Equipment
    Hydraulic Tank 30 Gallon, Steel, Side Mount, Buyers SMR30S - UnitedBuilt Equipment
    7 in stock

    Hydraulic Tank 30 Gallon, Steel, Side Mount, Buyers SMR30S

    Buyers
    $0.00 - $0.00
    $0.00
    $465.00
    $465.00 - $465.00
    $465.00

    Buyers 30 Gallon Side Mount Steel Reservoir The Buyers Products Side-Mounted Steel Reservoir features rugged, HRPO steel construction with a welded...

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    $0.00 - $0.00
    $0.00
    $465.00
    $465.00 - $465.00
    $465.00
  • image-coming-soon
    9 in stock

    Hydraulic Spline Coupler (Coupling) 1-1/4" Spline 14 Tooth, M10176

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $215.00
    $215.00 - $215.00
    $215.00

    $0.00 - $0.00
    $0.00
    $215.00
    $215.00 - $215.00
    $215.00
  • Hydraulic Tank 15 Gallon, Steel, Side Mount with Micron Filter, Buyers SMR15SF10 - UnitedBuilt Equipment
    Hydraulic Tank 15 Gallon, Steel, Side Mount with Micron Filter, Buyers SMR15SF10 - UnitedBuilt Equipment
    Save 31% Save %
    1 in stock

    Hydraulic Tank 15 Gallon, Steel, Side Mount with Micron Filter, Buyers SMR15SF10

    Buyers
    $643.72
    $643.72 - $643.72
    $643.72
    $445.00
    $445.00 - $445.00
    $445.00

    Tough, durable 13 Ga HRPO steel that has been factory powder-coated for corrosion resistance. Pre-drilled for tank-mounted HFA9 series micron filt...

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    $643.72
    $643.72 - $643.72
    $643.72
    $445.00
    $445.00 - $445.00
    $445.00
    Save 31% Save %
  • Valve Flow Control 51 - 12 SAE, 3/4" Oring, Brand Hydraulics FC51 - 12 - SAE - UnitedBuilt Equipment
    0 in stock. Available on backorder

    Valve, Flow Control 51-12 SAE, 3/4" SAE ORB (-12), Max Flow 30GPM, Max Pressure 3000 PSI, Brand Hydraulics FC51-12-SAE

    Brand Hydraulics
    $0.00 - $0.00
    $0.00
    $153.00
    $153.00 - $153.00
    $153.00

    The Brand Hydraulics FC51-12-SAE Flow Control Valve is a reliable, adjustable hydraulic valve designed to regulate flow rate in mobile and industri...

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    $0.00 - $0.00
    $0.00
    $153.00
    $153.00 - $153.00
    $153.00
  • 10 in stock

    Hydraulic Fitting, 16 MJICX 12 ORB, 6400-16-12-O

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $7.00
    $7.00 - $7.00
    $7.00

    $0.00 - $0.00
    $0.00
    $7.00
    $7.00 - $7.00
    $7.00
  • Hydraulic Fitting, Gates Coupling, 4G - 4FJX90S - UnitedBuilt Equipment
    Hydraulic Fitting, Gates Coupling, 4G - 4FJX90S - UnitedBuilt Equipment
    20 in stock

    Hydraulic Fitting, Gates Coupling, 4G-4FJX90S

    Gates
    $0.00 - $0.00
    $0.00
    $30.00
    $30.00 - $30.00
    $30.00

    Product Description The Gates 4G-4FJX90S MegaCrimp Hydraulic Hose Fitting is a high-performance, 90° elbow coupling designed for secure, leak-free ...

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    $0.00 - $0.00
    $0.00
    $30.00
    $30.00 - $30.00
    $30.00
  • Hydraulic Fitting, Gates Coupling, 12G - 12FJX - UnitedBuilt Equipment
    Hydraulic Fitting, Gates Coupling, 12G - 12FJX - UnitedBuilt Equipment
    98 in stock

    Hydraulic Fitting, Gates Coupling, 12G-12FJX

    Gates
    $0.00 - $0.00
    $0.00
    $33.00
    $33.00 - $33.00
    $33.00

    The Gates 12G-12FJX MegaCrimp Hydraulic Hose Fitting is a heavy-duty, straight coupling designed for secure, leak-free performance in hydraulic sys...

    View full details
    $0.00 - $0.00
    $0.00
    $33.00
    $33.00 - $33.00
    $33.00
  • Hydraulic Fitting, Gates Coupling, 3/4 CRIMP X 12 MJIC 90, 12G - 12FJX90S - UnitedBuilt Equipment
    Hydraulic Fitting, Gates Coupling, 3/4 CRIMP X 12 MJIC 90, 12G - 12FJX90S - UnitedBuilt Equipment
    3 in stock

    Hydraulic Fitting, Gates Coupling, 3/4 CRIMP X 12 MJIC 90, 12G-12FJX90S

    Gates
    $0.00 - $0.00
    $0.00
    $70.00
    $70.00 - $70.00
    $70.00

    The Gates 12G-12FJX90S MegaCrimp Hydraulic Hose Fitting is a heavy-duty 90° elbow coupling designed for secure, leak-free hydraulic connections in ...

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    $0.00 - $0.00
    $0.00
    $70.00
    $70.00 - $70.00
    $70.00
  • image-coming-soon
    10 in stock

    Hydraulic Fitting, 12 MJICX 12 ORB, 6400-12-12-O

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $5.00
    $5.00 - $5.00
    $5.00

    The 6400-12-12-O Hydraulic Adapter is a heavy-duty straight fitting designed to connect 3/4" Male JIC (37° flare) to 3/4" Male O-Ring Boss (ORB) po...

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    $0.00 - $0.00
    $0.00
    $5.00
    $5.00 - $5.00
    $5.00
  • image-coming-soon
    22 in stock

    Hydraulic Fitting, 90 Degree, 12 Male JIC x 12 Male NPT, 2501-12-12

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $12.50
    $12.50 - $12.50
    $12.50

    Here’s your Shopify-ready listing for the 2501-12-12: Product Title 2501-12-12 Hydraulic Adapter – 3/4" Male NPT x 3/4" Male JIC 37°, Straight Pr...

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    $0.00 - $0.00
    $0.00
    $12.50
    $12.50 - $12.50
    $12.50
  • image-coming-soon
    10 in stock

    Hydraulic Fitting, Straight Adapter, Rigid, 12 Male JIC 37° Flare x 12 Male NPTF, Steel, 2404-12-12

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $5.92
    $5.92 - $5.92
    $5.92

    Hydraulic Fitting, Straight Adapter, Rigid, 12 Male JIC 37° Flare x 12 Male NPTF, Steel, 2404-12-12

    $0.00 - $0.00
    $0.00
    $5.92
    $5.92 - $5.92
    $5.92
  • Oil Level Gauge with Temperature Gauge, Buyers LDR02A - UnitedBuilt Equipment
    Oil Level Gauge with Temperature Gauge, Buyers LDR02A - UnitedBuilt Equipment
    20 in stock

    Oil Level Gauge with Temperature Gauge, Buyers LDR02A

    Buyers
    $0.00 - $0.00
    $0.00
    $20.75
    $20.75 - $20.75
    $20.75

    $0.00 - $0.00
    $0.00
    $20.75
    $20.75 - $20.75
    $20.75
  • Hydraulic Coupler *Only* SAE B XS9, Franklin 305462041 - UnitedBuilt Equipment
    Hydraulic Coupler *Only* SAE B XS9, Franklin 305462041 - UnitedBuilt Equipment
    Save 13% Save %
    0 in stock. Available on backorder

    Hydraulic Coupler *Only* SAE B XS9, Franklin 305462041

    Franklin
    $557.00
    $557.00 - $557.00
    $557.00
    $487.00
    $487.00 - $487.00
    $487.00

    Hydraulic Coupler *Only* SAE B XS9, Franklin 305462041

    $557.00
    $557.00 - $557.00
    $557.00
    $487.00
    $487.00 - $487.00
    $487.00
    Save 13% Save %
  • Hydraulic Adapter Mounting Bracket, Franklin 305455017 - UnitedBuilt Equipment
    Hydraulic Adapter Mounting Bracket, Franklin 305455017 - UnitedBuilt Equipment
    Save 24% Save %
    0 in stock. Available on backorder

    Hydraulic Adapter Mounting Bracket, Franklin 305455017

    Franklin
    $729.00
    $729.00 - $729.00
    $729.00
    $557.00
    $557.00 - $557.00
    $557.00

    $729.00
    $729.00 - $729.00
    $729.00
    $557.00
    $557.00 - $557.00
    $557.00
    Save 24% Save %
  • Swivel Union 90D 1.5" MPT X FPT (1501 - 24 - 24) - UnitedBuilt Equipment
    7 in stock

    Hydraulic Fitting Adapter – 1-1/2" Male NPT x 1-1/2" Female NPT Swivel, 90° Elbow, 1501-24-24

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $45.16
    $45.16 - $45.16
    $45.16

    The 1501-24-24 Hydraulic Adapter is a heavy-duty 90° elbow swivel fitting designed to connect 1-1/2" Male NPT (MNPT) to 1-1/2" Female NPT (FNPT) co...

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    $0.00 - $0.00
    $0.00
    $45.16
    $45.16 - $45.16
    $45.16
  • Swivel Union 45D 1.5" MPT X FPT (1503 - 24 - 24) - UnitedBuilt Equipment
    16 in stock

    Hydraulic Fitting Adapter – 1-1/2" Male NPT x 1-1/2" Female NPT Swivel, 45° Elbow 1503-24-24

    UnitedBuilt Choice
    $0.00 - $0.00
    $0.00
    $43.70
    $43.70 - $43.70
    $43.70

    The 1503-24-24 Hydraulic Adapter is a heavy-duty 45° elbow swivel fitting designed to connect 1-1/2" Male NPT (MNPT) to 1-1/2" Female NPT (FNPT) co...

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    $0.00 - $0.00
    $0.00
    $43.70
    $43.70 - $43.70
    $43.70
  • Sight Gauge Plug, Hydraulic Fluid, 1/2 NPTF Brass, Buna - N, LDI LSP151 - 04 - 01 - UnitedBuilt Equipment
    Sight Gauge Plug, Hydraulic Fluid, 1/2 NPTF Brass, Buna - N, LDI LSP151 - 04 - 01 - UnitedBuilt Equipment
    13 in stock

    Sight Gauge Plug, Hydraulic Fluid, 1/2 NPTF Brass, Buna-N, LDI LSP151-04-01

    LDI Industries
    $0.00 - $0.00
    $0.00
    $16.94
    $16.94 - $16.94
    $16.94

    The LSP151 Series low pressure brass sight plug has a clear glass sight and male PTF pipe thread connection. Designed to be an economical alternati...

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    $0.00 - $0.00
    $0.00
    $16.94
    $16.94 - $16.94
    $16.94

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