Instruction Manual
P-2800 & P-2800D Hand Pumps - V1.1 www.durapac.com
Page 7 of 12
5.5
Relief Valve Adjustment
All pumps contain a factory set relief valve to prevent over-pressurisation of the
system.
6.0
Maintenance
IMPORTANT:
Check oil level regularly
Use only good quality hydraulic fluid.
Do NOT
use brake fluid, transmission fluid,
turbine oil, motor oil, alcohol, glycerine etc. Use of anything other than good quality
hydraulic oil will void warranty and damage the pump, hose, and application. We
recommend Durapac Hydraulic Oil or equivalent
Equipment must only be serviced by a qualified hydraulic technician. For repair service,
contact your local Durapac authorised service centre
Damage to hydraulic hoses may not be detected during visual inspections. For this
reason, Durapac recommends that hydraulic hoses be replaced on a regular basis
Tighten connections as needed. Use non-hardening pipe thread compound when
servicing connections
Dirt, sand, etc. will quickly ruin any hydraulic system. Ensure that couplings are clean and
free of foreign matter. After each use, clean couplings and attach dust caps.
Maintenance is required when wear or leakage is noticed. Periodically inspect all
components to detect any problem that may require service and maintenance.
6.1
Adding Hydraulic Fluid
WARNING: Always add oil with cylinders fully retracted (or extended, if pull cylinders) or
the system will contain more oil than the reservoir can hold
Air is required in the reservoir to function properly. If the reservoir is completely filled, a
vacuum will form preventing oil from flowing out of the pump
6.1.1
Depressurise and disconnect hydraulic hose from application/cylinder.
6.1.2
With the pump in its upright, horizontal position, remove the air vent plug
located on the top plate of the reservoir.
6.1.3
Use a small funnel to fill the reservoir to approximately 25 mm from the top of
the oil filler hole.
6.1.4
Bleed air from system if necessary.
6.1.5
Wipe up any spilled fluid and reinstall the air vent plug/reservoir cap.
6.2
Bleeding Air from the System
Air can accumulate in the hydraulic system during the initial setup or after prolonged
use, causing the cylinder / spreader to respond slowly or in an unstable manner. To
remove the air:
