This factory reference for the Z55 / 550Z compact excavator (OEM #50940331 Revision A) stays on one machine across its 760 pages, from rubber crawler specs through DPF replacement. It maps hydraulic circuit schematics with fluid routing for boom, arm, bucket, swing, travel, and blade, plus wiring diagrams for the engine ECU, hydraulic ECU, LCD monitor, and alarm systems. The procedures run deep: 9 pages of torque tables, 14 pages of error codes, and 168 pages of step-by-step adjustment and repair. Torque the M14 travel motor mounting bolts to 186.0 to 206.0 N·m, replace any hydraulic motor oil seal worn 25 µm or more, and hold front attachment pin-and-bushing clearance under 1.0 mm. When the machine is down, this hands you the factory answer instead of forum guesses. Bookmarked and keyword-searchable, it loads on your tablet at the jobsite.
What's Inside This Manitou America Z55, 550Z Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 9-19 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 20-56 | Specifications, Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List, Specifications for Attachment, Periodic Inspection and Servicing, Fuel |
| Service Standards | 57-91 | Machine Performance, Undercarriage (Rubber Crawler Specifications, Common Specifications of Rubber Crawlers), Controls, Hydraulic Equipment (Hydraulic Cylinders) |
| Engine | 92-274 | Safety (Statements, Precautions), Fuel System (Before You Begin Servicing, System Structure, Specifications, Diagram, Components) |
| Electric System | 275-320 | Electric Equipment of Machine (Parts Layout of Electrical Equipment, LCD Monitor and Alarm Systems), Circuit Description of Engine Start and Stop |
| Hydraulic System | 321-575 | Outline (Control Valve Operation, Additional Operation of Control Valve) |
| Adjustment and Repair | 576-743 | Engine and Electric Equipment (Removal Reinstallation: Starter Motor, Radiator and Oil Cooler, Fan Belt and Compressor Driving Belt, Engine ECU, Hydraulic ECU, Diesel Particulate Filter) |
| Troubleshooting | 744-756 | Non-Breakdowns (Natural Release of Bucket, Discontinuous Arm Movement, Drifting of Upperstructure on Quick Travel Operation, Thermal Shock of Travel Motor, Elongation of Boom Swing Cylinder on 68 Degrees Swing, Time Lag on Travel Speed Switching, Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change, Operation of Quick Coupler Cylinder) |
| Appendix | 757-760 | Wiring Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel motor mounting bolt (M14) tightening torque | 138.0 to 151.9 ft•lbf (186.0 to 206.0 N•m) | p. 611 |
| Hydraulic hose recommended working pressure (Code 2) | 2489 to 2986 PSI (17.2 to 20.6 MPa) | p. 16 |
| Hydraulic fitting (M12 x 1.75 parallel pipe thread) tightening torque | 57.9 to 72.3 ft•lbf (78.4 to 98.0 N•m) | p. 84 |
| Hydraulic motor oil seal wear limit | 0.0009843in.(25 µm) or more | p. 495 |
| Allowable clearance for front attachment pins and bushings | 0.04 in. (1.0 mm) | p. 73 |
| Bucket cylinder bottom end pin lock plate tightening torque | 57.9 to 72.3 ft•lbf (78.4 to 98.0 N•m) | p. 79 |
| Track roller & shaft diameter F wear limit | Ø6.14 (156) | p. 67 |
| Track roller mounting bolt (M16×35) tightening torque | 152 to 181 ft•lbf (206 to 245 N•m) | p. 616 |
| Idler & shaft diameter F wear limit | Ø13.15 (334) | p. 68 |
| Idler seal cover (M12×40) tightening torque | 58.0 to 72.3 ft•lbf (78.5 to 98.1 N•m) | p. 613 |
| Planetary gears A 1-18 and B 1-9 gear tooth surface wear limit | Pitting area rate : 5% or more of the engaged area | p. 541 |
| Hydraulic motor shaft spline wear limit | 0.0009843in.(25 µm) or more | p. 495 |
Manitou America Z55, 550Z Common Problems This Manual Covers
Manitou Z55 bucket linkage binding and front attachment disengagement failure during heavy trenching operations p. 73
Inspect the front attachment pins and bushings for wear exceeding the 0.04 in. (1.0 mm) allowable clearance on page 73. Replace worn components and torque the bucket cylinder bottom end pin lock plate to 57.9 to 72.3 ft•lbf (78.4 to 98.0 N•m) as outlined on page 79.
Manual Section: Service StandardsLeft side travel motor running excessively hot and tracking weakly after prolonged high speed tramming p. 611
Check the planetary gears for tooth surface wear exceeding the 5% pitting area rate on page 541. Verify the travel motor mounting bolts on page 611 are torqued to 138.0 to 151.9 ft•lbf (186.0 to 206.0 N•m). Drain and flush the drive housing if metal shavings are present.
Manual Section: Adjustment and RepairRubber crawler track slips off the idler and pops loose under load when turning on slopes p. 67
Measure the track roller and shaft diameter against the Ø6.14 (156) wear limit on page 67. Inspect the idler shaft diameter for wear beyond Ø13.15 (334) on page 68. Replace worn rollers and tension the track to spec before tramming the machine.
Manual Section: Service StandardsSluggish arm movement and visible fluid leaking from the main hydraulic pump high pressure fittings p. 24
Verify the hydraulic oil tank capacity is at the required 19.5 Gals mark on page 24. Inspect Code 2 hydraulic hoses for swelling and ensure fittings are torqued to 57.9 to 72.3 ft•lbf (78.4 to 98.0 N•m) as specified on page 84. Replace any compromised O-rings.
Manual Section: Technical DataFrequently Asked Questions
What do error codes mean on a Manitou Z55 excavator?
An 'Error Code List' breaks down each code by classification, description, detection condition, cause, and corrective measure. Take code 00 000091.03: it flags an 'Accelerator sensor malfunction: High voltage,' triggered when 'The sensor voltage is higher than 4.6 V.' The fix usually means checking connectors, wire harnesses, and the sensor itself, then cycling the starter switch from 'OFF' to 'ON' to recheck.
What are the torque specs for the swing bearing bolts on a Manitou 550Z?
Swing bearing bolt torque lives in the 'List of Tightening Torque' section. Both the 'Swing bearing × Track frame' and 'Swing bearing × Turning frame' M16 × 90 bolts call for 195.3 to 224.2 ft·lbf (264.8 to 304.0 N·m), secured with Loctite 262 or K-965 adhesive.
How to clear fault codes on Mustang 550Z
For many listed codes, clearing simply means cycling the starter switch from 'OFF' to 'ON' and checking whether the code returns. To wipe stored entries from the 'Defect History' with the SMARTASSIST DIRECT (SA-D) tool, select 'Diagnostic Codes,' open 'Defect History,' and press the 'All Clear' button.
What are the replacement specifications for hydraulic hoses?
Each hydraulic hose is defined by its part description, which encodes the material (Plastic, Rubber), working pressure (e.g., 2489 to 2986 PSI), nominal diameter (e.g., 3/8"), fitting type (e.g., Taper pipe thread R (PT)), total length in cm, and hose protector (e.g., Coil spring). A 3/8" nominal diameter, for instance, carries the code '06'.
What do I get after purchasing this Manitou America Z55, 550Z manual?
The complete 760-page searchable Service Manual downloads immediately, ready on any device: the laptop at your desk or your phone in the field.
Is this Manitou America Z55, 550Z Service Manual printable?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this Manitou America Z55, 550Z Service Manual have electrical diagrams?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Manitou America Z55, 550Z.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The main body text is crisp and easy to read throughout. Diagrams and illustrations are raster images; while generally clear, some smaller labels may exhibit slight blurriness when zoomed in. Pages are clean with no scan artifacts or skewed content. You will find several intentional blank pages marked as 'This page intentionally left blank' included as filler.
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