Description

Dynapac LH 300, LH 700 2001 Workshop Manual

You have an LH 300 or LH 700 vibrating plate that won’t pull itself across the dirt, or maybe the eccentric housing is leaking. You pull the head bolts off the Honda GX 270, and you need a torque number. Not a guess. Not a number from some forum. You need the factory specification. That is what this 21-page Dynapac LH 300, LH 700 2001 Workshop Manual gives you. Direct from Dynapac’s own workshop documentation, printed October 2001. No aftermarket reprint, no third-party scanning. This is the original PDF that came from Sweden.

Technical Data and Fluid Capacities

Page 3 of the manual lays out all the numbers you need to avoid burning up a pump or seizing a bearing. For the LH 300 with the Honda GX 270 engine, the hydraulic pressure is set at 1523 psi. The LH 700 runs at 2611 psi. If you set the relief valve wrong on that machine, you will blow a hose or damage the hydraulic motor. The manual also specifies oil grades: SAE 15W-40 for the engine and eccentric housing, Shell Tellus TX68 for the hydraulic system. Fuel tank capacity for the LH 300 is 6.3 quarts. The LH 700 holds 7.4 quarts. Tightening torques are listed for the main housing bolts – oiled threads, M12x160 grade 12.9 gets 77.3 lb.ft. M16 bolts get 189 lb.ft. That is the kind of detail you do not find in a generic repair guide.

Hydraulic System and Diagrams

Two full hydraulic diagrams are included – one for the LH 300 on page 5, one for the LH 700 on page 6. These are not simplified block drawings. They show every line, every check valve, the control spool routing for forward and reverse. If you are chasing a loss of traction or a vibration that only works in one direction, you can trace the circuit. The “Principles of operation” section on page 4 explains how the hydraulic drive interacts with the eccentric weight system. The drive works on the same shifting principle as a Manual Transmission – engaging different gear ratios through a planetary set inside the hydraulic motor.

Eccentric Assembly: Step-by-Step for LH 300 and LH 700

This manual breaks the eccentric housing rebuild into individual chapters. For the LH 300, you get the identification of the control shaft, then separate assembly sequences for the drive shaft, the piston, and the hydraulic engine attachment. Same for the LH 700 – eight dedicated sections from “Eccentric housing identification” all the way through “Eccentric housing assembly”. Each step calls out which bolts get Loctite 243, which oil seals must be replaced, and the tightening sequence. The eccentric weight bolts are torqued to 52 lb.ft across both models. Neglect that and the weight shifts, wrecking the housing. A Manual Transmission gearbox that loses a bearing can exhibit a similar clunk – but here the damage is to the eccentric bearing races.

Troubleshooting

Page 20 of the manual is a dedicated troubleshooting table. It runs through common failures: plate does not vibrate, vibration weak, hydraulic motor runs but no travel, oil leaks from eccentric housing. For each symptom there is a probable cause and a fix. No guessing. If the vibration is intermittent, the manual points to the eccentric oil level check (page 19 specifies the LH 300 eccentric housing holds 0.53 quarts of SAE 15W-40). If the oil is low, the bearing seizes. The troubleshooting section also covers electrical starting issues on the Hatz 1D90V engine used in the LH 700.

Audience Fit: Who Needs This Manual

This manual is for anyone who owns or services a Dynapac LH 300 or LH 700 forward/reversing plate compactor. Rental yards, landscape contractors, and concrete crews all run these machines. If you are a shop tech who has to rebuild three of these a month, having the factory hydraulic diagram on hand saves you from calling the Dynapac dealer every time a hose routing question comes up. DIY owners who buy a used LH 300 off a jobsite and want to freshen the eccentric bearings will get the correct clearance specs and torque values. You do not need a full dealer-level scan tool – just a set of hex keys, a torque wrench, and this manual open on the bench.

Source Authenticity: OEM Factory Print vs Aftermarket

I have seen aftermarket binders that try to cover multiple brands with one generic set of instructions. They leave out the hydraulic diagram for your specific model or they round the torque to the nearest 10 lb.ft. Not good enough. This is the original Dynapac workshop manual, published 2001, part number WLHALLEN1. It covers only LH 300 and LH 700 machines with serial numbers starting from 30060138 and 70030178. The 21 pages are scanned from the actual Swedish-published document. No redrawn diagrams, no missing pages. The page 3 technical data table is exactly what Dynapac printed.

FAQ

Does this manual cover the engine (Honda GX 270 or Hatz 1B30/1D90V)?

Yes. The Engine specifications are on page 3 – fuel tank capacity, oil type, RPM settings. For in-engine repairs you need a separate engine workshop manual, but the hydraulic and eccentric sections rely on engine RPM and oil specs from this manual.

Is the hydraulic diagram the same for both LH 300 and LH 700?

No. They are two different diagrams on separate pages. The LH 300 uses a single-direction pump with a reversing valve; the LH 700 has a tandem pump setup. Both are in this manual.

What torque values are listed for the eccentric weight bolts?

70 Nm (52 lb.ft) for both models, oiled threads.

Can I use this manual for an LH 800?

Not directly. The LH 800 shares some hydraulic design but has different engine and eccentric housing dimensions. Look for the Dynapac LH 300 LH 700 LH 800 2002 Workshop Manual for that coverage. However, the LH 300 and LH 700 parts catalogs are also available: see Dynapac LH 300 Parts Catalog and Dynapac LH 300 Spare Parts Catalog for individual part numbers.

If you work on these machines every week, stop pulling numbers from the internet. Get the factory document that Dynapac mechanics used. Access the Factory Manual right now and keep it on a tablet in the toolbox – you will be glad you did when that eccentric housing comes apart.