Fantuzzi SF — Hydraulics: technical cards
General guidance only — always follow the operation and maintenance manual for your specific machine.
Short answers to precise questions on the hydraulic system of the Fantuzzi SF side-loader lift trucks, one fact per card, each with its source stated in the text. For the overall picture, see the Fantuzzi SF technical legacy guide.
Fantuzzi SF U: which hydraulic fluid and quantity do the filling tables give?
The filling tables give SAE 80W to API GL-4: 158 litres on the SF 30 U to SF 40 U and 160 litres on the SF 45 U to SF 65 U, as logged by the HIT SRL technical desk. According to the same tables, the wheel assemblies run on the same fluid and are counted in the hydraulic quantity, as recorded at HIT SRL. The 1998 lubrication chart gives the same 158 and 160 litres, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-hydraulic-fluid · HIT ref SF-054 · fingerprint 73c043 · see HIT ref SF-038, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/transmission-and-driveline/#hit-sf-transmission-oil-grade
Fantuzzi SF U: where is the hydraulic reservoir and how is it checked?
The 2003 operator's manual places the reservoir on the chassis behind the driver's seat, with the level checked engine off at the top notch, as set out in the HIT SRL technical cards. The maintenance manual of the same edition places the sump on one side of the machine, so the two descriptions differ, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-hydraulic-reservoir · HIT ref SF-055 · fingerprint 00cc7a · see HIT ref SF-061, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-oil-level-temperature-indicator
Fantuzzi SF U: how does the operator know a hydraulic return filter is blocked?
A warning appears on the monitor in the cab, according to the 2003 maintenance manual, as HIT SRL's technical desk reads it. The return filters on top of the hydraulic sump have an electrical blockage indicator, and the same manual has the cartridges replaced when the warning shows, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-return-filter-indicator · HIT ref SF-056 · fingerprint 5a0dfc · see HIT ref SF-061, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-oil-level-temperature-indicator
Fantuzzi SF U: how is hydraulic fluid added?
The fluid is pre-filtered at 10 microns and poured in through the quick coupling on the filter covers, according to the 2003 maintenance manual, as set out in the HIT SRL technical cards. The same manual asks for fluid of the type already in the sump, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-topping-up-10-microns · HIT ref SF-057 · fingerprint 3381da · see HIT ref SF-054, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-hydraulic-fluid
Fantuzzi SF: which hydraulic pressures do the manuals give?
The 1998 SideLIFTS tables give a working pressure of 160 bar for the SF 30 U to SF 60 U and for the SF 45, SF 50 and SF 60, as logged by the HIT SRL technical desk. The pressure control diagram of the older O.M.F. handbook shows test gauges at 175 bar on the three-section control valve, as recorded at HIT SRL. The same handbook shows test gauges at 140, 85 and 30 bar on other circuits, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-working-pressure · HIT ref SF-058 · fingerprint e65a05 · see HIT ref SF-054, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-hydraulic-fluid
Fantuzzi SF 30-40 E: how is the hydraulic oil changed?
According to the older SF handbooks, with the forks on the ground and the traverse cylinders retracted, the tank valve is closed and the suction pipes disconnected, the oil drained and the mesh filter cleaned, then the tank is refilled, the HIT SRL technical desk notes. The same handbooks have the lift cylinder bled through its vent screw with the engine idling and the lift lever in the raise position, as set out in the HIT SRL technical cards. Before the level is checked above MIN, the same handbooks have the forks raised fully and the mast tilted fully forward, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-hydraulic-oil-change-older · HIT ref SF-059 · fingerprint 3a0def · see HIT ref SF-093, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/maintenance-intervals/#hit-sf-hydraulic-tank-jobs
Fantuzzi SF U: what are the rules for the hydraulic accumulators?
According to the 2003 maintenance manual, only skilled staff repair the hydraulic accumulators, and the outer shell is never welded, brazed or drilled under any circumstances, as recorded at HIT SRL. The same manual has the gas precharge checked with the hydraulic system not under pressure, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-accumulators · HIT ref SF-060 · fingerprint b3e2c2 · see HIT ref SF-094, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/maintenance-intervals/#hit-sf-hydraulic-component-jobs
Fantuzzi SF 30 U and SF 40 U: how is the hydraulic oil level read?
On an indicator that shows both the hydraulic oil level and its temperature, according to the 1998 SideLIFTS manual, as HIT SRL's technical desk reads it. The same manual adds that these two models have a coolant expansion tank and that the brake fluid reservoir is in the cab under the seat, as recorded by the HIT SRL technical desk.
Source: HIT SRL technical desk — https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-oil-level-temperature-indicator · HIT ref SF-061 · fingerprint c6def4 · see HIT ref SF-055, https://www.hitsrl.it/technical-resources/guides/fantuzzi-sf/hydraulics/#hit-sf-hydraulic-reservoir