Tracking down replacement components for your 2004 crawler backhoe is simple with this 173-page Yanmar B7-5A parts catalog PDF (OEM #Y00S4320). Inside, you get highly detailed exploded views covering the entire boom cylinder assembly, undercarriage crawlers, and the complete engine block. Open to exact hydraulic piping breakdowns for the travel motors and full electrical schematics that map out every wiring harness and connector routing. Verify your main electrical protection with the 50A slow blow fuse rating, or confirm the exact spec for a 12V55W headlight bulb before calling the dealer for replacements. Stop wasting time ordering the wrong components from confusing aftermarket sites. Download the securely bookmarked file, pull up the right schematic on your tablet, and get your equipment back to work.
What's Inside This Yanmar B7-5A Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Label | 1 | Set, Accelerator, Lock, Operation, P.T.O. |
| Safety Label | 2 | Caution Plate Assy, Danger, Operation Manual Case |
| Muffler | 3 | Pipe, Exh, Cover, Manifold, Glass Wool, Clamp, Bolt, Nut |
| Air Cleaner | 4 | Assy, Body Assy, Valve, Unloader, Element, Hose, Air Intake, Bracket |
| Accelerator Lever | 5 | Lever, Accelerator, Grommet, Stay Assy, Joint, Cable, Shaft, Desel |
| Engine Mount | 6 | Bracket Rr, Bracket Fr, Mount, Engine, Stopper, Seat, Spring, Bolt |
| Radiator & Sub-Tank | 7 | Radiator, Sub-Tank Assy, Cap, Hose, Clamp, O-Ring |
| Radiator Mount | 8 | Bracket Assy, Seal, Radiator, Plate Assy, Stay Assy, Grille, Duct, Rubber |
| Fuel Tank | 9 | Assy, Cock, Gauge Unit, Fuel Inlet Net, Cap Assy, Fuel Catch |
| Fuel Line | 10 | Hose Assy, Pump Assy, Separator Assy, Element, O-Ring, Clamp |
| Battery | 11 | Cord, Harness, Code, Retainer, Rod |
| Electric Part (Wiring) | 12 | Harness a Assy, Huse, Diode, Harness B Assy, Fuse B30, Harness Boom Lamp |
| Electric Part (Equipment) | 13 | Switch Start, Key Assy, Lamp Comp, Horn, Relay Safety, Timer |
| Indicator Box | 14 | Switch Assy, Gauge Assy, Meter Assy, Circuit Assy, Bulb |
| Wind Washer | 15 | Harness F, Bracket Washer, Washer Tank Assy, Bracket, Joint W Pipe, Bolt M10X 16 |
| Heater | 16 | Guide Assy, Valve Assy, Duct Assy, Hose, Seal |
| Defroster | 17 | Pipe, Hose (a), Bolt W/WASHER M10X20, Grommet 43 |
| Sprocket & Roller | 18 | Sprocket, Bolt 14X35, Washer 14X35, Roller, Lower, Bushing, Shaft |
| Idler & Crawler Adjust | 19 | Idler Assy, Idler, Bushing, Idler Seal Cover, Floating Seal, Shaft |
| Crawler | 20 | Track Shoe 450L Assy, Link Assy, Bush, Track, Pin, Master |
| Control Equipment (Lock Lever & Stand) | 21 | Grip, Red Round, Stand, Link, Bracket, Boot, Guide L, Hose |
| Control Equipment (Travel) | 22 | Boots, Lever L Assy, Track, Bush, Lever R Assy, Grip L, Drive |
| Control Equipment (Blade) | 23 | GRIP(BLACK), Lever, Blade, Bolt M10X 35 Plated, Nut 10, Spring Washer, O-Ring 1A P-21.0 |
| Control Equipment (Offset) | 24 | Link Assy, Swing, Bush 2015, Link, Pedal, Shaft, Washer 10 36 4.5, O-Ring 27X5.7 |
| Control Equipment (Low-High Pedal) | 25 | Spring, Return, Pedal, Lo-Hi, Bracket, Bush, Pad |
| Control Equipment (P.T.O. Pedal) | 26 | Spring, Link Ball, Pedal, Swing, Shaft, P.T.O., O-Ring, Nipple |
| Control Valve Plate | 27 | Cushion L Assy, Plate, Valve, Circlip, Bolt M10X |
| Frame & Turning Bearing | 28 | Frame Assy, Lower, Cover, Frame, Turning Bearing, Seal, Upper |
| Cover (Frame) | 29 | Under a, Plate, Frame L, Seal, Oilpan, Bolt W/WASHER |
| Cover (Around the Control) | 30 | Multi, Rubber, Edge, Seat R, Assy, Bolt W/WASHER, Cushion, Bonnet |
| Cover (Around the Seat) | 31 | Ventilator, Seat Mt, Trim a, Grille Assy, Rubber, Bolt W/WASHER |
| Cover (Boom) | 32 | Grommet, Boom B, Boom a, Washer, Bolt W/WASHER |
| Step & Instrument Panel | 33 | Step, Mat, Instrument Panel, Cover |
| Seat Mount | 34 | Cover F, Cover a, Assy, Plate, Seat, Bracket, Gas Spring, Bracket Assy |
| Bonnet (Body) | 35 | Clamp, Hose, Plate, Hinge Assy, Key Assy, Cylinder, Seal, Cover Front |
| Bonnet (Upper Cover) | 36 | Assy, Up, Sponge, Cover, Ex., Plate, Stopper, Lever Assy |
| Bonnet (Side & Rear Cover) | 37 | Hook, Cover, Lock, Assy, Lever Assy, R Assy, Catcher |
| Cabin Mount | 38 | Sponge Seal, Sponge Cabin, Absober Pad a, Absober Pad B, Seal |
| Hyd. Oil Pump & Joint | 39 | Pump Cmp, Rotary Group, Control Piston, Cover Assy, Trochoid Pump, Pump, Gear |
| Boom Cylinder | 40 | Cylinder, Boom, Seal Set, Head, Piston, Cushion Bearing |
| Arm Cylinder | 41 | Seal Set, Head, Piston, Cushion Bearing, Cylinder Head |
| Bucket Cylinder | 42 | Rod, Bucket, Seal Set, Piston, Cylinder Head, Bush, Tube |
| Blade Cylinder | 43 | Head, Piston, Seal Set, Rod, Blade, Bush, Tube |
| Offset Cylinder | 44 | Rod, Offset, Head, Piston, Cylinder Seal Kit, O-Ring |
| Travel Motor | 45 | Seal Kit, Piston Seal, Spindle Kit, Rv Gear, Swash Plate, Cylinder Block |
| Turning Motor | 46 | Reduction Gear, Gear Case, Motor Assy, HYD.OIL, Plate, Friction, Seal Kit, Gauge Comp. |
| Accumulator | 47 | Bracket, Clamp, Connector, O-Ring, Hose, Bolt |
| Swivel Joint | 48 | Shaft, Seal Assy, Hub, Swivel, Plate, Thrust Washer, O-Ring |
| Control Valve (1/7) | 49 | Section Assy, Bucket, Bolt, Socket Head, O-Ring, Cap, Poppet, Packing |
| Control Valve (2/7) | 50 | Boom-1 Section, Bolt, Socket Head, Anti-Drift Valve, O-Ring, Poppet, Packing |
| Control Valve (3/7) | 51 | Drive, R Section Assy, Bolt, Socket Head, Spring, Plate, Seal, O-Ring |
| Control Valve (4/7) | 52 | Drive, L Section Assy, Bolt, Socket Head, Spring, Plate, Seal, O-Ring |
| Control Valve (5/7) | 53 | - |
| Control Valve (6/7) | 54 | - |
| Control Valve (7/7) | 55 | - |
| Remote Control Valve | 56 | - |
| Lub. Oil Cooler | 57 | Absober, Shock, Grommet, Oil Cooler, Bracket Assy, Hoc, Bolt W/WASHER M8X16 |
| Hyd. Oil Tank | 58 | Reservoir Assy, Strainer, Suction, Filter Assy, Return, Gauge Assy, Oil, O-Ring |
| Hyd. Oil Piping (Tank~Pump~Control Valve) | 59 | Flange, Elbow, Connector, O-Ring, Hose, Band |
| Hyd. Oil Piping (Pump, Control V., Turning Motor, Boom) | 60 | Joint PF1/4, Adapter, Connector, O-Ring, Band, Hose |
| Hyd. Oil Piping (Pump, Control V. ~Swivel) | 61 | Connector, Stop Valve, O-Ring, Nipple, Joint, Hose |
| Hyd. Oil Piping (Return 1) | 62 | Connector PF1/4-45, O-Ring, Adjustable Tee, Joint PF1/4, Connector, Hose |
| Hyd. Oil Piping (Return 2) | 63 | Bracket Assy, PTO, Connector, Stop Valve, Nipple, Elbow G1/2-3/4, Hose |
| Hyd. Oil Piping (P.T.O. : Frame End) | 64 | Adaptor, Joint PF1/4, Connector, Joint Rgi, O-Ring, Hose |
| Hyd. Oil Piping (Track Frame) | 65 | Tube a, Collar, Clamp, Adapter, Rubber a, Hose G112BC115K |
| Hyd. Oil Piping (Boom) | 66 | Joint PF1/4, Connector PF1/4, O-Ring, Hose F403BE132S, Hose F403BC125S, Hose G804BY096 |
| Hyd. Oil Piping (P.T.O. : Boom End) | 67 | Tube a, Collar, Clamp, Adapter, Rubber a, Hose G112BC11 |
| Control Piping (Pump~Remote Control V. ~Return) | 68 | - |
| Control Piping (Remote Control V. ~Control V.) | 69 | - |
| Greasing | 70 | - |
| Boom-A | 71 | - |
| Boom-B | 72 | - |
| Boom-C | 73 | Spacer, Shim, Seal, Bush, Pin, Nipple |
| Arm | 74 | Arm Cylinder, Bush, Pin, Seal, Shim, Spacer, Nipple |
| Bucket Arm & Link | 75 | Shim, Seal, Bush, Pin, Nipple, Bolt |
| Bucket Pin | 76 | O-Ring, Pin, Shim, Bolt, Nut |
| Blade | 77-173 | Spacer, Shim, Seal, Bush, Pin, Plate |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuse Rating | 30A | p. 37 |
| Fuse Rating (Slow Blow) | 50A | p. 37 |
| Headlight Bulb Voltage/Wattage | 12V55W | p. 39 |
| Indicator Box Bulb Voltage/Wattage (Type T6.5) | 13.5V-2W | p. 41 |
| Indicator Box Bulb Voltage/Wattage (Type T5) | 14V-2W | p. 41 |
| Spring Dimension (Travel Motor) | 22.5/7X92/8.2 | p. 92 |
| Shim Thickness (Travel Motor) | 32X45X0.3 | p. 92 |
| O-Ring Dimension (Swivel Joint) | 1A P-80.0 | p. 111 |
| O-Ring Dimension (Hyd. Oil Tank) | 1A G-135.0 | p. 131 |
| O-Ring Dimension (Control Valve) | 1A G70.0,NBR | p. 113 |
Yanmar B7-5A Common Problems This Manual Covers
Need the correct hydraulic tank seal replacement part numbers for Yanmar B7-5A(EP) due to fluid weeping at the reservoir base p. 58
Inspect the Hyd. Oil Tank exploded view on page 58 to find the reservoir assembly components. Verify the exact O-Ring Dimension is 1A G-135.0 from page 131 before ordering. Cross-reference the strainer and suction filter part numbers while you have the tank open.
Manual Section: Hyd. Oil TankMain power completely dead and need to locate the exact slow blow fuse part number for intermittent power loss p. 37
Check the Bonnet (Side & Rear Cover) breakdown on page 37 to identify the fuse block components. Order the exact 50A Fuse Rating (Slow Blow) replacement part listed in the index. Inspect the surrounding harness and connectors for visible burning or damage.
Manual Section: Bonnet (Side & Rear Cover)Trying to find the correct spring and shim part numbers after the travel motor starts making grinding noises p. 45
Review the Travel Motor assembly diagrams on page 45 for the exact piston seal and swash plate part numbers. Order the required 22.5/7X92/8.2 Spring Dimension and 32X45X0.3 Shim Thickness parts shown on page 92 to complete the final rebuild properly.
Manual Section: Travel MotorNeed the right swivel joint seal kit part numbers to fix severe hydraulic fluid leaks and pressure loss p. 48
Open the Swivel Joint parts breakdown on page 48 to locate the main shaft and seal assembly numbers. Ensure you order the correct 1A P-80.0 O-Ring Dimension specified on page 111 to rebuild the hub. Replace the thrust washer at the same time.
Manual Section: Swivel JointFrequently Asked Questions
What are the replacement specifications for hydraulic hoses?
The manual provides replacement specifications for hydraulic hoses in the form of part numbers and descriptive names. For example, the "HYD.OIL PIPING" section lists "HOSE H108CX147" with part number 172455-78170 on page 135, and "HOSE H208BC068S" with part number 172455-78210 on page 137. These details are crucial for ordering the correct replacement parts.
What are the replacement specifications for engine filters (air, oil, fuel)?
The manual provides replacement specifications for engine filters in the form of part numbers and descriptive names. For the air filter, the "ELEMENT" is part number 129062-12560 (page 21). For the fuel filter, the "ELEMENT" is part number 119802-55710 (page 33). The manual also lists hydraulic filters, such as "FILTER" part number 172164-73660 (page 91) and "FILTER ASSY, RETURN" part number 172187-73700 (page 131).
How do you fix the hydraulic tank seal replacement part numbers for Yanmar B7-5A due to fluid weeping at the reservoir base?
Inspect the Hyd. Oil Tank exploded view on page 58 to find the reservoir assembly components. Verify the exact O-Ring Dimension is 1A G-135.0 from page 131 before ordering. Cross-reference the strainer and suction filter part numbers while you have the tank open.
How do you fix main power completely dead and need to locate the exact slow blow fuse part number for intermittent power loss?
Check the Bonnet (Side & Rear Cover) breakdown on page 37 to identify the fuse block components. Order the exact 50A Fuse Rating (Slow Blow) replacement part listed in the index. Inspect the surrounding harness and connectors for visible burning or damage.
How will I receive this Yanmar B7-5A Parts Catalog?
This is a 173-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you are under the hood. No shipping, no waiting.
Is this Yanmar B7-5A Parts Catalog printable?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are there hydraulic diagrams in this Yanmar B7-5A Parts Catalog?
Yes. This parts catalog includes exploded hydraulic piping and component diagrams (HYD.OIL PIPING / Hyd. Oil Tank) on pages 58, 131, 135, and 137, showing individual component part numbers and assembly layouts. Note: this is a parts catalog, not a workshop circuit schematic.
Reviews
There are no reviews yet.