Central Lubrication System (Option)

An electric pump pumps grease to a distribution system at regular intervals. This distribution unit is then set to deliver different volumes of grease to each grease point depending on the required lubrication interval.

A circular grease reservoir of 4 kg (8.8 lb) capacity, with a see-through wall so that a visual check can be made on the grease level. A rotating arm, inside the reservoir forces grease into the pump chamber through a perforated plate to eliminate air bubbles. A rubber wipe blade on the charging arm ensures that the operator can always make a visual check on the grease level.

Both grease pumps rotate at 15 rpm and are capable of generating up to 30000 kPa (300 bar; 4350 psi) pumping pressure:

• 0.12 cm ³ (0.0073 cu.in.) fixed displacement pump for greasing the forage harvester
• 0.04 - 0.12 cm ³ (0.0024 - 0.0073 cu.in.) variable displacement pump for greasing headers and harvesting units

The unit is powered from a 12 V electrical supply, energized by the vehicle main clutch switch.

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A control unit to switch the pump on and off according to a pre-progammed cycle time of 16 minutes pumping and 30 minutes non-pumping (rest phase). If a greasing cycle is interrupted by switching the main clutch off, the greasing cycle started will be completed when the main clutch is next switched on. The operator may initiate a greasing cycle immediately by pressing button (A) on the pump housing.

Unit charging (filling) system. Normally this is via a standard grease fitting, allowing the unit to be filled with a standard grease gun, or via a quick-release coupling, allowing air-operated greasers to be used for a faster filling.

NOTE: Top up the grease reservoir of the central lubrication system once a week.

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The grease is delivered to a bank of primary distributors. Each distributor in the primary distributor block in turn delivers to a bank of secondary distributors, which meter the grease to the grease points.

The distributors are supplied with grease progressively - that is, each grease point is greased in turn once during each cycle.

The amount of grease delivered is determined by the diameter of the piston in each distributor. The size of the distributor for each grease point is in turn determined by the greasing interval required (for manual greasing) and the volume of grease needed (for manual greasing). Three different volumes are used:

• 0.025 cm ³ (0.0015 cu.in.) per greasing cycle
• 0.045 cm ³ (0.0027 cu.in.) per greasing cycle
• 0.075 cm ³ (0.0046 cu.in.) per greasing cycle

Every grease point is greased during each greasing cycle.

NOTE: If the forage harvester is equipped with a central lubrication system, certain lubricating points are supplied with grease automatically. This does not apply to lubricating points requiring a 250- or 500-hour service interval, or to lubricating points on rotating components, with the exception of compressor mounting (250 hours) and deflector pulley bearing of main drive (500 hours).

Yellow light (A) indicates that the system is operational after engaging the main clutch (the light will glow for approx. 2 seconds). During the lubrication cycle the light will flash at a 0.5-second interval.

When the forage harvester is shut off, the grease or rest cycle will be interrupted and all relevant data are stored. When the main clutch is engaged the next time, the program will continue to run, starting at the point of interruption. An additional lube impulse may be started at any time by pressing button (B). When pressing button (B), the stored cycle time will be deleted, i.e. grease or rest cycle time will start at "zero" again.

A-Yellow indicator light
B-Button for additional lube impulses

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For checking system operation, initiate 2 or 3 additional lube impulses to determine whether grease is supplied to all lubricating points.

If the system is blocked (but not damaged), grease will escape at relief valve (C). This is a safety feature which allows system checks.

C-Relief valve

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