Hydraulic System Air Purge, Level | Exmark VT730EKC524, VT691KA524

Exmark VT730EKC524, VT691KA484CA, VT691KA524CA, VT651KA484 manual Hydraulic System Air Purge, Level

Maintenance

Every 500 hours/Yearly (whichever comes first) thereafter

(Every 250 hours/Yearly if using Mobil 1 15W50)

Note: Use only Exmark Part No. 109–4180 for Summer use above 32°F (0°C) or P/N 1-523541 for Winter use below 32°F (0°C) (Refer to Transmission section in Specifications for filter specifications).

1.Stop engine, wait for all moving parts to stop, and remove key or spark plug wire(s). Engage parking brake.

2.Carefully clean area around filter. It is important that no dirt or contamination enter hydraulic system.

3.Unscrew filter to remove and allow oil to drain from reservoir.

Important: Before reinstalling new filter, fill it with Exmark Premium Hydro oil and apply a thin coat of oil on the surface of the rubber seal.

Turn filter clockwise until rubber seal contacts the filter adapter, then tighten the filter an additional 2/3 to 3/4 turn.

4.Fill reservoir as stated in Check Hydraulic Oil

Level.

Exmark Premium Hydro Oil is recommended. Refer to the chart for an acceptable alternative:

Hydro Oil	Change Interval

Exmark Premium Hydro	500 Hours
Oil (Preferred)
Mobil 1 15W50	250 Hours

5.Loosen filter 1/2 turn and allow a small amount of oil to leak from the oil filter (this allows air to be purged from the oil filter and supply hose from the hydraulic reservoir). Turn filter clockwise until rubber seal contacts the filter adapter. Then tighten the filter an additional 2/3 to 3/4 turn.

6.Raise the rear of machine up and support with jack stands (or equivalent support) just high enough to allow drive wheels to turn freely.

CAUTION

Raising the mower for service or maintenance relying solely on mechanical or hydraulic jacks could be dangerous. The mechanical or hydraulic jacks may not be enough support or may malfunction allowing the unit to fall, which could cause injury.

Do Not rely solely on mechanical or hydraulic jacks for support. Use adequate jack stands or equivalent support.

7.If either drive wheel does not rotate, one or both of the charge pumps (located on the top of the main pump as shown in Figure 21) may have lost their “prime”. Refer to Hydraulic System Air Purge section.

Note: Do Not change hydraulic system oil (except for what can be drained when changing filter), unless it is felt the oil has been contaminated or been extremely hot.

Changing oil unnecessarily could damage hydraulic system by introducing contaminates into the system.

Hydraulic System Air Purge

Service Interval: As required

Air must be purged from the hydraulic system when any hydraulic components, including oil filter, are removed or any of the hydraulic lines are disconnected.

The critical area for purging air from the hydraulic system is between the oil reservoir and each charge pump located on the top of each variable displacement pump (Figure 21). Air in other parts of the hydraulic system will be purged through normal operation once the charge pump is “primed”.

VT691KA524CA, VT691KA484CA, VT651KA484, VT730EKC524, VT691KA524 specifications

The Exmark VT691KA524, VT730EKC524, VT651KA484, VT691KA484CA, and VT691KA524CA mowers represent some of the most advanced lawn care technology in the market. Each model is designed to deliver professional-grade performance, ensuring lawns are impeccably manicured.

The VT691KA524 features a robust 691cc engine, delivering powerful performance. Its 52-inch cutting deck allows for efficient mowing, making it ideal for medium to large-sized lawns. The mower incorporates Exmark's innovative patented UltraCut deck design, which offers exceptional cut quality and reduced clumping. Additionally, it boasts a high-capacity fuel tank, which is designed for extended operation without frequent refueling.

Another standout model, the VT730EKC524, comes with a 730cc engine, providing even more horsepower. This model supports advanced cooling and air filtration systems that enhance engine life and performance. The VT730EKC524’s fully adjustable cutting height options allow users to customize their mowing experience, ensuring a clean and even cut on various grass types.

The VT651KA484, equipped with a 651cc engine, emphasizes manoeuvrability and ease of use. It features a compact design that allows it to navigate tight spaces. The 48-inch cutting deck still provides a significant mowing width, and the model is also equipped with Exmark’s patented parking brake system for added safety.

The VT691KA484CA and VT691KA524CA are both equipped with the powerful 691cc engine like the VT691KA524. However, they come with unique functionalities that enhance their usability. The -CA variants offer additional features, such as an improved comfort seat and steering controls, making them ideal for extended mowing sessions without fatigue.

All these models feature Exmark’s signature Precision-Theory mower technology. This ensures that the mower maintains a consistent speed and cutting height while preventing scalping on uneven terrain. Furthermore, the mowers are constructed with durable, high-quality materials designed for longevity, ensuring that they can withstand the rigors of regular use.

With their user-friendly operation, advanced technologies, and rugged construction, the Exmark VT series mowers are an excellent investment for anyone looking to maintain an attractive and healthy lawn. Whether you choose the VT691KA524 for its efficiency or the VT730EKC524 for its superior horsepower, each model guarantees professional-quality results.