Description

Tamrock HE 122, HE 119, HE 300, HL 300, HL 300 S 2004 Operators Manual

If you’re running a Tamrock HE 122 or any of the HL 300 series rock drills without the factory spec sheet, you’re gambling with tie rod torque and accumulator charge pressures. I’ve watched too many shops blow seals or snap shanks because they used generic values from a third-party website. This 2004 Tamrock HE 122, HE 119, HE 300, HL 300, HL 300 S 2004 Operators Manual is the real deal — 74 pages of Sandvik Tamrock’s own documentation, covering the HL 710 and HL 710S drilling units that these models use. Every bolt torque, every wear limit, every lubrication interval is right there.

Lifting Instructions and Hydraulic Rock Drill Safety

First thing in the manual: LIFTING INSTRUCTIONS OF HYDRAULIC ROCK DRILLS. That’s not just a chapter title—it’s a safety checklist. Lifting a 200‑lb drill wrong costs you a back or a floor. The manual gives the exact lift points and handling procedures. If you’ve ever seen a drill drop because someone eyeballed the sling position, you know why this section alone is worth the access.

Checking and Tightening Bolts and Tie Rods

Section 7 covers CHECKING AND TIGHTENING BOLTS AND TIE RODS. This is where most failures happen. The manual breaks out tie rod tightening (page references inside), pressure accumulator bolt torque, idle gear shaft specs, rotation motor bolts, and flushing device bolts. Without these numbers, you’ll either under-torque and get leaks or over-torque and stretch the hardware. I’ve seen both. The manual also gives the correct sequence — because on a rock drill, order matters.

One detail: the pressure accumulator bolts are listed with specific ft‑lb values. You can’t guess those — too loose and the accumulator walks, too tight and you crack the housing. That’s in Section 7.2. Use a calibrated torque wrench. No shortcuts.

Percussion Mechanism Assembly: Factory Tolerances

Section 6 of the repair instructions walks you through Percussion mechanism assembly. The manual shows the order of piston, sleeve, and valve components. It also lists the required tools, including the special seal installation kit. If you’re rebuilding a HL 300 percussion unit, you need the wear limits from Section 7 of the repair part. For example, the shank wear limits (Section 6.9 in operation) tell you when to replace before you snap a rod. I keep a copy of that page taped to my toolbox.

Pressure Accumulator Filling Pressures

Another section I use constantly: PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL: Repair instructions. Chapter 7.3 gives the exact filling pressures for low pressure (LP) and high pressure (HP) accumulators, plus the stabilizer accumulator. Pumping the wrong nitrogen charge kills performance and can damage the diaphragm. The manual includes the filling device procedure — steps you won’t find in any aftermarket summary. If you’re working on an HE 119 or HL 300 S, this is your reference.

Who Needs This Operators Manual?

If you own, operate, or maintain a Tamrock HE 122, HE 119, HE 300, HL 300, or HL 300 S, this manual is for you. It’s written for the guy in the field — the one who has to mount a new drill, connect the hoses, and get the lube system right (Section 4 covers both underground and surface models). The Periodic maintenance section (8.3 through 8.8) tells you what to inspect daily, weekly, and after service. Beginners can follow the test run procedure in Section 2.3. Pros will appreciate the wear limits and torque specs they can’t find anywhere else.

OEM vs Aftermarket: Why This Print Matters

This is a factory document from Sandvik Tamrock, 2004 printing. It’s not a reprint or a scan of someone’s notes. The pages match the original binder — I’ve compared it to my own shop’s copy. Aftermarket manuals often skip the torque tables or substitute generic values. This one has the original tie rod tightening sequence (Section 7.1) and the correct seal placement diagrams. You can trust the 74 pages because they came from the same engineers who designed the drills. That matters when you’re assembling a percussion mechanism and the clearance is measured in thousandths.

For related equipment, see the Tamrock Ranger 700/800 Operator’s Manual”>Tamrock Ranger 700/800 Operator’s Manual or the Tamrock Cylinder Feed TF 500 / TFX 500 Maintenance”>Tamrock Cylinder Feed TF 500 / TFX 500 Maintenance. If you need electrical schematics, grab the Tamrock AXERA 5-126 2006 Wiring Diagram”>Tamrock AXERA 5-126 2006 Wiring Diagram. For general reference on hydraulic systems, read about Manual Transmission”>Manual Transmission principles—they share similar fluid dynamics. Also check Manual Transmission”>Manual Transmission for gear train basics that apply to rotation motors.

Frequently Asked Questions

Does this manual cover the HE 122 drill only or the HL 300 S as well?

This 2004 operators manual covers the entire range: HE 122, HE 119, HE 300, HL 300, and HL 300 S. The content inside focuses on the HL 710 and HL 710S drilling units which are the core assemblies used across these models. So yes, if you run any of those, you need this book.

Are torque values given in foot-pounds or Newton-meters?

Imperial units (ft‑lb) are listed throughout.

Access the Factory Manual now and keep your rock drill running with the specs that the factory intended. No guesswork, no generic internet copies — just the original 74 pages.