Terex C5000 Series User manual

TEREX UTILITIES TECHNICAL SUPPORT TEAM
PHONE: 1-844-TEREX4U (1-844-837-3948) | EMAIL: [email protected]
MODEL(S): TOOLS NEEDED:SERVICE CALL:
NO.
ADJUSTING SYSTEM RELIEF
PRESSURE C4000, C5000, C6000, GENERAL HYDRAULIC PRESSURE GAUGE (0-5000 PSI)
9/16” OR ¾” WRENCH
SET OF STANDARD ALLEN
WRENCHES
ADJUSTING SYSTEM RELIEF PRESSURE
02

DANGER
Failure to obey the instructions and safety
rules in the appropriate Operator’s Manual and
Service Manual for your machine will result in
death or serious injury.
Many of the hazards identied in the
Operator’s Manual are also safety hazards
when maintenance and repair procedures are
performed.
DO NOT PERFORM
MAINTENANCE UNLESS:
√You are trained and qualied to perform
maintenance on this machine.
√You read, understand and obey:
•manufacturer’s instructions and safety rules
•employer’s safety rules and worksite
regulations
•applicable governmental regulations
.
√You have the appropriate tools, lifting
equipment and a suitable workshop.
The information contained in this Tech Tip is a
supplement to the Service Manual. Consult the
appropriate Service Manual of your machine for
safety rules and hazards.
PAGE 2 OF 7
TECH TIP 02 | RELEASED 02.07.2022 | VERSION 1.0
TECH TIP 02 | RELEASED 02.07.2022 | VERSION 1.0
©TEREX UTILITIES. ALL RIGHTS RESERVED

PAGE 3 OF 7
CONTENTS
TECH TIP#02
TOC
4| Determine gauge installation location
INTRODUCTION
STEP 1
5| Test Ports
| Install the gauge
STEP 2 - STEP 3
6| Verify pressure setting and adjustment
STEP 4
TECH TIP 02 | RELEASED 02.07.2022 | VERSION 1.0

TECH TIP 02 | RELEASED 02.07.2022 | VERSION 1.0
When setting system relief, it must be veried
that system pressure is present at the base
of the lift cylinders. If system pressure is not
present or improperly set, the unit may not
be able to lift the capacities shown on the
load chart. This is the reason why pressure is
checked at the base of the lift cylinders or by
hooking into Hydraulic Overload Protection
(HOP).
INTRODUCTION
• Repair procedures shall be completed by a
person trained and qualied on the repair of this
machine.
• Immediately tag and remove from service a
damaged or malfunctioning machine.
• Read this procedure completely and adhere
to the instructions. Attempting shortcuts may
produce hazardous conditions.
• Consult your unit specic maintenance manual
STEP 1
Determine gauge installation location:
• Units with HOP, use port G1 on HOP manifold
• Units without HOP, tee gauge in the control line for lift up between cylinder and control valve
FIGURE 1
PAGE 4 OF 7

Escaping uid under pressure can penetrate skin causing serious injury.
Relieve pressure before disconnecting hydraulic lines. Keep away from
leaks and pin holes. Use a piece of cardboard or paper to search for leaks.
DO NOT use your hand.
TECH TIP 02 | RELEASED 02.07.2022 | VERSION 1.0
STEP 2
Install the gauge in the location indicated in
step one. The boom must be supported by the
boom rest or the lift cylinders must be retracted
fully before attempting to install the gauge.
FIGURE 2 - Test Port
FIGURE 3 - Test Port
485770 HOP Manifold Shown for G1 Location Individual sensing valve may also be located
under the rider seat on the command post
STEP 3
Operate unit to bring hydraulic uid to normal
operating temperature.
PAGE 5 OF 7

TECH TIP 02 | RELEASED 02.07.2022 | VERSION 1.0
STEP 4
Raise boom to full elevation or attach to a solid object with the load line. The object must be heavier
that what is indicated on the load chart.
Set throttle to maximum setting and engage lift up control. Verify on the gauge that the pressure is
set to what is shown on the unit placard.
If pressure is not at desired level, locate return manifold in pedestal. (Manifold shown below)
Adjust CW to increase setting or CCW to decrease setting. Adjust to specication listed on the unit
placard.
Return manifold with the current style system
relief cartridge.
PAGE 6 OF 7

FOR FURTHER ASSISTANCE,
CONTACT THE TEREX UTILITIES TECHNICAL SUPPORT TEAM
PHONE: 1-844-TEREX4U (1-844-837-3948) | EMAIL: [email protected]