Getting the brakes right on a modular axle is the single job the 76 pages of this Manitou Carraro 26.27M, 26.32M repair manual PDF (OEM ID CA270292) are written to handle. Operating procedures take up the largest share of the book. They cover the negative parking brake through its disable and enable sequence, the radial screws system, service brake circuit bleeding and a testing routine that checks axle, pinion, wheels and gear after assembly. Brake type identification, wear checks, vents and an adhesives and tightening torques table come first, so you know which brake you have before a bolt comes out. Apply 13 bar to free the parking brake, expect 20 to 25 bar for passive release, and bring the nuts up to 40 Nm with the plugs at 30 Nm. A negative brake that won't release ruins an afternoon. Bookmarked and text-searchable, the PDF is yours to keep for every brake job this axle sees.
What's Inside This Carraro 26.27M, 26.32M Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Instructions | 3-16 | General Safety Recommendations, Safety Information, General Precautions |
| General Information | 17-30 | Manual Use, Information Property, Agreements and Definitions, General Description |
| General Specifications | 31-42 | Brake Type Identification, Getting Started, Faq, Service Brakes, Parking Brakes, Brakes Wear Check, Connections and Vents, Adhesives and Tightening Torques |
| Service and Parking Brakes | 44-60 | Parking Negative Brake, Parking Brake Disable, Parking Brake Enable, Radial Screws System |
| Axle with Service Brakes | 61-63 | Service Brake System, Brake Bleeding, Brake Circuit, Brake Fluid |
| Axle with Parking Brakes | 64-69 | Parking Negative Brake, Parking Brake Disable, Parking Brake Enable, Parking Brake System Bleeding |
| Testing After Assembly | 70-76 | Testing Methods, Axle, Pinion, Wheels, Gear |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Parking brake release pressure | 13 bar | p. 50 |
| Passive brake release pressure | 20-25 bar | p. 52 |
| Tightening torque for nuts (5) | 40 Nm | p. 54 |
| Tightening torque for plug (8) | 30 Nm | p. 46 |
| Tightening torque for plug (2) | 20 Nm | p. 46 |
| Tightening torque for bleed valve | 12 Nm | p. 46 |
Carraro 26.27M, 26.32M Common Problems This Manual Covers
Carraro 26.27M/26.32M brake discs friction material worn, calibrated pin does not fit between counterplates
Actuate the service brake with the machine stationary, then remove plug (p) as shown on page 40. The manual warns of violent oil ejection there, so follow its safety procedures. Insert a calibrated pin of proper diameter between the counterplates. If the pin fits, leave the discs in; if it does not, replace the worn discs. Torque plug (8) to the prescribed value and check the other brake group.
Manual Section: Brakes wear check p. 40On 3 radial screws axle, negative parking brake stays engaged and wheels lock with engine off
Lock all wheels with a mechanical system and put warning tags on the ignition key and steering wheel before disabling the brake (page 49). On both axle sides, release grub screws (1) while holding special screws (2) firmly locked. Screw in release bolts (3) half a turn at a time in sequence A, B, C until the braking torque drops off sharply (4 to 5 turns). Clear all personnel before removing the wheel locks.
Manual Section: Parking brakes disable (3 radial screws system) p. 49Parking brake not re-activated after towing, release bolts still screwed in and wheels turning free
Lock all four wheels mechanically before any operation (page 50). Apply 13 bar to parking brake feeding port (4), remove grub screws (1) while holding special screws (2), then back out release bolts (3) to end of stroke, about half a turn at a time in sequence A, B, C. Release port pressure, refit lock screws (1) and torque them. Verify the parking brake holds before removing the wheel locks (page 51).
Manual Section: Parking brakes enable (3 radial screws system) p. 50When re-enabling 2 axial screws passive brake, brake piston locks crosswise in the cylinder
Lock all wheels mechanically and tag the ignition key and steering wheel (page 54). Apply 20 to 25 bar to release port (B), then unscrew release screws (6) gradually, about half a turn at a time in sequence 6a, 6b, so the piston stays square in the cylinder. Adjust screws (6) to the prescribed measure, apply B2 sealant to nuts (5), torque them to 40 Nm, and release the pressure at port (B).
Manual Section: Passive brakes enable (2 axial screws system) p. 54Energy-less vehicle with 2 axial screws passive brake will not roll for towing, brakes stay engaged
Lock all wheels mechanically and tag the ignition key and steering wheel (page 53). Do not try to disable the negative brake with hydraulic or pneumatic pressure. On both sides, unscrew nuts (5), then screw in release bolts (6a) and (6b) half a turn at a time in sequence until the braking torque drops off sharply and the wheels turn free. Clear all personnel before removing the wheel locks and towing.
Manual Section: Passive brakes disable (2 axial screws system) p. 53Newly installed axle has passive negative brake disabled from the factory, no parking brake hold
Reactivate the passive brake right after installing the axle. Page 37 warns the vehicle could cause fatal accidents if it is used with the passive brake off. Follow the enable procedure for your brake type: page 50 for the 3 radial screws system or page 54 for the 2 axial screws system. Bleed the service brake system following page 61, then check brake operation before putting the machine to work.
Manual Section: General Specifications p. 37Frequently Asked Questions
What are the torque specifications for Carraro 26.27M, 26.32M axle components?
The manual specifies several torque values for axle components. For example, the special screws on the axle are tightened to 12 Nm, 20 Nm, 30 Nm, or 40 Nm depending on the specific location as shown in the diagrams on page 46. p. 46
What are the replacement specifications for seal rings and O-rings on the Carraro 26.27M, 26.32M axles?
It is highly advised to replace all sealing parts, including O-rings, seal rings, and gaskets, during every teardown or repair. Additionally, when assembling shaft seals, lubricate the lips with oil and fill 3/4 of the seal cavity with grease. p. 28
What is the procedure for bleeding the service brake system?
To bleed the service brake system, input pressure through the oil port (1) to keep the circuit pressurized, then unscrew the bleeder valve (2) until the oil exits free of air bubbles. Once finished, tighten the bleeder valve to the required torque as specified in section C.8. p. 62
What pressure does the parking brake release port need during activation on the Carraro 26.27M, 26.32M axle?
When enabling the parking brake system with radial screws, you must apply a pressure of 13 bar to the feeding port (4) of the parking brake. p. 50
What parking brake release port pressure do the Carraro 26.27M, 26.32M axles need with the axial screws system?
For the axial screws system, you must apply a pressure of 20 to 25 bar to the parking brake release port (B) to enable the passive brakes. p. 54
What do I get after purchasing this Manitou Carraro 26.27M manual?
A 76-page Repair Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Am I able to print pages from this Manitou Carraro 26.27M manual?
You can. Print the sections you want for your own use and keep the file as your backup.
Reviews
There are no reviews yet.