Hydraulic Feed MAINTE- Nance 72620 | Hayter Mowers 71620, 74824

Service and Maintenance

5.13HYDRAULIC FEED MAINTE- NANCE (72620 & 74824)

CAUTION

Before servicing or repairing any of the hydrostatic feed components (pump, motor, and/or relief valve), contact your dealer or factory service department. Warranty on these items may be void without prior authorization.

CAUTION

Hydraulic systems contain fluid under high pressure. Never check for leaks with your hands. Relieve pres- sure before disconnecting any hydraulic lines.

The hydrostatic pump normally does not require regular fluid changes. The system filter should be changed at 250 hour or annual intervals. The fluid and filter should be changed and system cleaned if the fluid becomes contaminated with foreign matter (water, dirt, grease, etc.) or if the fluid has been subjected to temperature levels greater than the maximum recommended.

There is a greaseable bearing on each side of the main jack shaft on the main hydraulic feed housing. Grease periodically.

5.14 ADDING HYDRAULIC FLUID

Hydraulic fluid is used to drive the feed roller. The hydraulic pump is attached to the motor (diesel models) or connected to the motor with a belt (gasoline models).

Premium hydraulic fluids containing high quality rust, oxidation, and foam inhibitors are required. These include premium turbine oils, API CD engine oils per SAE J183, M2C33F or G automatic transmission fluids meeting Allison C-3 or Caterpillar TO-2, and certain specialty agricultural tractor fluids.

Below are the necessary startup procedures:

1.Before starting the hydrostatic pump, make sure all sys- tem components (reservoir, fittings, etc.) are clean.

2.Fill the reservoir with recommended hydraulic fluid. (Note: The hydraulic fluid must be filtered before before entering the reservoir)

3.The inlet line leading from the reservoir to the charge pump must be filled before start-up. Loosen the fitting at the pump on the inlet line until oil bleeds out.

4.Start the engine and run at the lowest possible RPM.

5.Loosen the motor fittings until oil bleeds out to remove air from the system. Retighten fittings.

6.As air is expelled from the unit, the oil level in the reser- voir drops down and bubbles may appear in the fluid. Refill the reservoir as necessary.

7.Run the feed roller in both directions for several minutes until any remaining air is completely expelled from the unit. Refill the reservoir as necessary.

8.Shut down the engine, check and correct any fluid leaks. check. Check the reservoir level and add fluid if neces- sary. The hydrostatic pump is now ready for operation.

6" & 8" Bear Cat Chipper Operator’s Manual

Page 15

72620, 71620, 74824 specifications

Hayter Mowers is well known for its high-quality garden equipment, particularly its advanced and robust mowers. Among their popular models, the Hayter 74824, 71620, and 72620 stand out, each designed to meet diverse lawn care needs. These mowers showcase innovative technologies and features that enhance performance and user experience.

The Hayter 74824 is renowned for its powerful performance, specifically designed for larger gardens. It is equipped with a robust engine capable of delivering consistent power for various grass types, ensuring efficient mowing even in challenging conditions. Its cutting width of 48 cm allows for faster mowing, while the adjustable cutting heights cater to different grass lengths, accommodating various lawn care preferences. The 74824's unique feature is its variable speed drive, providing operators with optimal control over the mowing pace, making it easier to navigate around obstacles in the garden.

The Hayter 71620 is a more compact model, ideal for medium-sized lawns. It combines ease of use with high efficiency. Featuring a 41 cm cutting deck, this mower offers excellent maneuverability, which is especially useful in smaller areas. The 71620 includes an easy-start engine technology, enabling hassle-free ignition and improved reliability. Additionally, its grass collection system is designed for maximum efficiency, ensuring minimal clippings are left behind to maintain your lawn's aesthetics.

The Hayter 72620 serves as another excellent option for homeowners seeking a reliable mowing solution. Similar in features to the 71620, it offers a slightly wider cutting deck at 46 cm, delivering more coverage while maintaining the same power efficiency. Equipped with a hybrid grass bag that optimizes airflow, the 72620 enhances grass collection effectiveness, promoting a neat finish. Its ergonomic handle design makes it comfortable to operate for extended periods, reducing fatigue for the user.

All these models are built with high-quality materials, ensuring durability and long-lasting performance. Furthermore, Hayter's commitment to environmental sustainability is showcased in these mowers' efficient fuel consumption and reduced emissions, making them an environmentally responsible choice.

In summary, the Hayter 74824, 71620, and 72620 are exemplary choices in lawn care, each model catering to specific needs with innovative features, efficient performance, and user-friendly designs. Whether for expansive lawns or compact gardens, Hayter mowers deliver exceptional results, revolutionizing the way we care for our outdoor spaces.