Pump Component LOCA- Tions Models 72620

Service and Maintenance

5.10HYDRAULIC FLUID (MODELS 72620 & 74824)

Handle pressurized hydraulic fluid carefully. Escaping pressurized hydraulic fluid can have sufficient force to penetrate your skin causing serious injury. This fluid may also be hot enough to burn. Serious infection or reactions can develop if proper medical treatment is not administered immediately.

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.

5.12HYDROSTATIC PUMP START UP PROCEDURE (MODELS 72620 & 74824)

Follow this start-up procedure when starting a new installation or when restarting an installation in which the hydrostatic pump has been removed from the system.

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

2.Fill the reservoir with recommended hydraulic fluid, which should be filtered 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 on this inlet line until oil bleeds out.

5.11PUMP COMPONENT LOCA- TIONS (MODELS 72620 & 74824)

Fig. #9

WARNING

Do not start engine unless pump is in neutral position on the cable.

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

5.As air is purged from the unit, the oil level in the reser- voir will drop and bubbles may appear in the fluid. Refill the reservoir as necessary.

6.Run the unit and move the control arm in both direc- tions for several minutes until any remaining air is purged from the unit. Refill the reservoir as necessary.

7.Check to ensure feed roller stops when control arm is in the neutral position. Adjust the cable clevis or anchor if the feed roller doesn't stop.

NOTE

A motor fitting may have to be loosened and oil bled to remove air from the system (use same procedures as steps 3-5).

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

NOTE

Hydrostatic pressure controlled by the crossover relief valve is factory set at 1750 PSI.

Page 14

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

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.

Hayter Mowers 71620, 74824 manual Hydrostatic Pump Start UP Procedure Models 72620

Models: 72620 71620 74824