Description

New Holland CB18S, CB27S, CB37S 2009 Technical Manual

I’ve busted knuckles on more hydraulic hammers than I care to count, and the first thing I learned is this: skip the factory specs on a breaker and you’re buying a new accumulator or worse, a housing. This New Holland CB18S, CB27S, CB37S 2009 Technical Manual is what you need if you’re rebuilding a CB18S, a CB27S, or a CB37S hammer. The OEM released it in 2009, it runs 204 pages, and it covers every torque value, dimension, and disassembly step that the CNH factory requires. No aftermarket reprint, no generic hydraulic hammer guide – this is the binder that the dealer techs get.

Torque Specs and Fluid Capacities – Page 7

Page 7 has the torque setting table. That’s where you find the exact ft-lb numbers for the bolts on the housing, the valve body, and the accumulator mounting. I’ve seen guys snap a 12mm bolt because they guessed 60 ft-lb instead of the 48 ft-lb listed. The manual also lists technical specs like operating pressure and flow rates – vital if you’re matching the hammer to a skid steer or excavator. Don’t trust third-party charts. Use page 7.

Releasing Hydraulic Pressure – Page 18 – Do Not Skip This

Page 18 shows the procedure for releasing hydraulic pressure from the hammer and the accumulator. I’ve seen a 2,500 psi bladder pop a fitting off and put a hole in a shop wall. Follow the depressurization steps in order – the manual doesn’t assume you know where the bleed ports are. It gives you the exact sequence for the CB18S and the larger models. If you’re swapping a tool bushing (page 12-13), you need to do this first.

Valve Body and Distributor – Disassembly & Assembly

Starts on page 22. The valve body and distributor section walks you through pulling the spool and the cartridge valves. The manual lists the required service tools (page 2 of the bookmark section) – you’ll need a spanner wrench for the lock nut. The assembly steps on page 26 include the torque sequence for the distributor bolts. I’ve seen hammers chatter because the distributor wasn’t torqued evenly – this is where the OEM spec prevents that.

3 Critical Troubleshooting Procedures

The troubleshooting section (page 14) is short but dense. It covers low blow energy, erratic cycling, and leakage past the seals. Each symptom has a bullet list of possible causes and the corrective action. For example, if the hammer won’t fire, the manual tells you to check the back-pressure in the return line first. That’s the kind of diagnostic logic that saves you from tearing the whole unit apart. There’s no “maybe” in this manual – it’s cause and effect with page references to the repair steps.

Why Factory OEM Beats Aftermarket

I’ve ordered aftermarket manuals for older hydraulic hammers and they often leave out the main parts illustration (page 6) or the overall dimensions page (page 3-4). The CB18S and CB27S dimensions differ – the S type and SI type have different lengths and mounting bolt patterns. If you’re fabricating a bracket, you need the exact Ø36 mounting hole placement. Aftermarket reprints sometimes resize the drawings. This PDF is a direct scan of the CNH France print – March 2009. No reprint errors. No guessed tolerances. Related manuals you might need: New Holland 480, 500, 540 1998 Technical Manual – OEM Factory Specs for older loader backhoes, or the New Holland CX8080 Technical Manual – OEM Factory Specs for Combine Repair for bulk combine work. For electrical systems on later equipment, see New Holland ACM265009 2006 Technical Manual – Fault Codes & Electrical Systems.

Who Needs This Manual?

If you’re a home garage enthusiast tearing down a second-hand breaker, or a shop owner who inherited a fleet of CB series hammers, this is the documentation you need. The manual assumes you have basic mechanical tools – list on page 2 – but it teaches the specific sequence for removal and installation of the tool (page 10-11) and the tool bushing. That’s where beginners strip threads because they don’t know that the bushing requires a press fit and a specific drift size. The manual calls out the tool part numbers so you can order the correct extractor.

One more thing: the manual references a Manual Transmission application for these hammers – they’re designed for use with a power take-off drive on some older New Holland tractors. That’s not your typical hydraulic hammer setup. The wiring diagrams and pressure release steps are specific to that drivetrain configuration. If you’re adapting the hammer to a Manual Transmission tractor, you need the OEM dimensions to fabricate the mounting plate. The manual gives you both S and SI type dimensions – double-check your model number before you order parts.

Does this manual cover the CB90S or larger models?

No. This PDF is specifically for CB18S, CB27S, and CB37S models only. The table of contents lists separate manual reference numbers for CB90S and CB32 through CB150. You need a different manual for those.

Are the torque specs in foot-pounds or Newton-meters?

Page 7 lists torque settings in Nm. Convert to ft-lb by dividing by 1.356. Use a torque wrench calibrated per the range – some bolts are as low as 25 Nm (18 ft-lb). Don’t guess.

Can I use this manual for an older model like the CB18 (non-S)?

The overall dimensions on page 3-4 show both S and SI types. The SI type has a different mounting bracket. If your hammer is pre-2005, the accumulator location may differ. Check the drawing before ordering seals.

What if I lose the access link?

Contact us through the site. We keep backups. Your purchase is stored on your account – you can re-access anytime. No reprint, no extra charge.

Look, I’ve been wrenching for 28 years. There are two kinds of manuals: ones that make you feel smarter, and ones that make the job go faster. This is the second kind. You get the factory service specifications, the workshop procedures from page 17 through the end, and the troubleshooting logic that keeps a hammer running for another 2,000 hours. Access the Factory Manual and put it on a tablet in the shop – or print the pages you need. Your future self will thank you when the accumulator doesn’t blow a seal.