maintenance

Forward/Reverse Relief Valves Drive Adjustment

The forward and reverse relief valves (Figure 30) are located in the hydrostatic pump (not on the manifold block) under plugs 1 and 2 . Plug 2 is located in the same location as plug 1, except it is on the bottom side of the pump. Relief valve 1 is reverse and 2 is forward.

NOTICE

Pumps supplied after 01/01/2003 do not have adjustable relief cartridges. The pressure is fixed at 2,900 ± 145 psi. If the relief pressure is not within normal range, the complete cartridge must be replaced.

REVERSE

RELIEF VALVE

(PLUG 1)

HYDROSTATIC

PUMP

FORWARD

RELIEF VALVE

(PLUG 2)

Figure 30. Adjusting Relief Valves

1.Clean the area around the cap.

2.Remove the cap.

3.Carefully remove the valve cartridge.

4.Using an allen wrench, remove the top nut (extreme care must be taken not to loosen existing shims, spring, or valve) Add or remove shims as required. Adding shims increases pressure; removing shims lowers pressure. One shim is equal to approximately 50 psi. Shim P/N is 34538.

5.Install the top nut and install valve in the pump cavity using extreme care not to bind.

6.Install the valve cap.

7.Retest pressure, further adjustment may be needed if pressure is not correct.

S t e e r i n g R e l i e f Va lv e P r e s s u r e Adjustment

To adjust the relief valve steering pressure perform the following:

1.Insert an 8 mm allen wrench into steering relief port 4 (Figure 36) on the manifold block.

Figure 31. Steering and Vibration Relief Valves

2.On the manifold, connect at 5,000 psi pressure gauge into quick disconnect test port 1.

3.Start the engine and run at full throttle.

4.Turn the steering wheel to the left or right (maximum) and hold. Read the steering relief pressure. The relief pressure reading for the steering test port 1 will should be 700 psi.

5.If the steering relief pressure is not 700 psi, using the allen wrench adjust the pressure at port 4 until the pressure gauge reads 500 psi.

Vibration Relief Valve Pressure Adjustment

1.Insert an 8 mm allen wrench into steering relief port 5 (Figure 31) on the manifold block.

2.On the manifold block, insert a 5,000 psi pressure gauge into quick disconnect test port 1.

3.Start the engine and run at full throttle.

4.To start the vibration, press the pushbutton switch (vibration control) located on top of the travel lever.The relief pressure should read 900 ~ 1,500 psi.

5.If the vibration relief pressure is not 900 ~ 1,500 psi, using the allen wrench, adjust the pressure at port 5 until the pressure gauge reads correctly.

AR13HA/AR13HAR ROLLER (s/n 110301 & up) • operation AND PARTS manual — rev. #0 (06/22/11) — page 27

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Multiquip AR13HAR manual Forward/Reverse Relief Valves Drive Adjustment, Vibration Relief Valve Pressure Adjustment
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AR13HA, AR13HAR specifications

The Multiquip AR13HAR and AR13HA are advanced, rugged, and efficient walk-behind rollers designed for various construction and road maintenance applications. These compact rollers are specifically engineered to handle asphalt and soil compaction tasks, making them ideal for both professional contractors and do-it-yourself enthusiasts seeking high-quality performance in compact spaces.

One of the standout features of the Multiquip AR13HAR and AR13HA is their excellent maneuverability. With their tight turning radius, these rollers can easily navigate confined areas, allowing for effective compaction even in challenging sites. This makes them particularly useful for patching, trench work, and other localized applications.

The AR13HAR model is equipped with a reliable water-cooled engine that delivers robust power, ensuring consistent performance throughout the compaction process. The hydraulic system offers smooth operation, allowing operators to adjust the roller's speed and direction with ease. The self-propelled functionality further enhances user experience, catering to various operator preferences.

In terms of compaction capability, both models are fitted with high-frequency vibrating plates that facilitate superior compaction results. The AR13HAR and AR13HA can achieve impressive compaction depths, making them suitable for a wide range of material types. Users can expect consistent and uniform compaction across the working surface, which is essential for building durable pavements and bases.

Another important aspect is their durability. Multiquip has crafted the AR13HAR and AR13HA with robust materials, ensuring that they can withstand the rigors of construction sites. The rollers feature reinforced frames and sturdy drums designed to endure harsh conditions, contributing to a longer lifespan with less maintenance required.

Safety is also a priority in the design of these rollers. They come equipped with essential features like an emergency stop switch and operator protection measures to ensure a secure working environment. Additionally, the ergonomic controls are intuitively positioned, promoting operator comfort and reducing fatigue during extended use.

Overall, the Multiquip AR13HAR and AR13HA represent a perfect fusion of power, agility, and safety in compact roller technology. Their impressive features and robust design make them a reliable choice for professionals looking to enhance efficiency and productivity in their compaction projects. Whether it's a small repair task or a larger construction job, the Multiquip AR13 series can deliver results that meet and exceed expectations.
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