SHB 803 en – Edition 2.4 * 803s410.fm
4-7
Engine
4.5 Checking the injection nozzles
Pressure check
☞
Remove the injection line and the injection nozzle
☞
Connect the injection nozzle with the high pressure line of the nozzle tester
☞
Slowly increase pressure until the nozzle ejects fuel and read the pressure off the pres-
sure gage
☞
If the injection pressure is too low, replace the spacer in the nozzle by a thicker one. If
the pressure is too high, replace the spacer by a thinner one.
➥
Injection pressure:
120 – 130 bar (1740 – 1885 psi)
• Spacer thickness of 0.1 mm (0.0039") corresponds to modification by 7 – 10 bar (101 –
145 psi).
• Check the injection nozzle for drips after it has ejected fuel.
☞
Create a pressure of about 20 bar (290 psi) below injection pressure and check
whether fuel drips from the nozzle.
4.6 Checking the nozzle jet
☞
Remove the injection lines and the injection nozzles
☞
Connect the injection nozzle with the high pressure line of the nozzle tester
☞
Quickly create pressure until the nozzle ejects fuel (ejection 3 – 4 times)
☞
Hold a white sheet of paper about 30 cm (11.8") away from the nozzle and let the noz-
zle eject fuel
Fig. 3:
Nozzle tester
Leak oil line
Compression
spring seat
Nozzle needle
Pressure spring centring
Nozzle body
Lower nozzle
screw fitting
Compression
spring
Upper nozzle
screw fitting
Spacers
Fig. 4:
Correct shape of nozzle jet
Fig. 5:
Wrong shape of nozzle jet
Summary of Contents for 803 Dualpower
Page 1: ...Service Manual Track excavator Machine model 803 Edition 2 4 Order no 1000164843 Language en ...
Page 8: ...I 6 SHB 803 en Edition 2 4 803s20IVZ fm Table of contents ...
Page 9: ...Operation ...
Page 23: ...Technical data ...
Page 38: ...2 16 SHB 803 en Edition 2 4 803s210 fm Technical data ...
Page 39: ...Maintenance ...
Page 96: ...3 58 SHB 803 en Edition 2 4 803s314 fm Maintenance ...
Page 97: ...Engine ...
Page 133: ...Hydraulic system ...
Page 155: ...SHB 803 en Edition 2 4 803s511 fm 5 23 Hydraulic system Hydraulic system Hydraulics diagram ...
Page 157: ...SHB 803 en Edition 2 4 803s511 fm 5 25 Hydraulic system 5 11 Hydraulics diagram ...
Page 160: ...5 28 SHB 803 en Edition 2 4 803s511 fm Hydraulic system ...
Page 161: ...Electrical system ...
Page 168: ...6 8 SHB 803 en Edition 2 4 803s611 fm Wiring harnesses ...
Page 181: ...SHB 803 en Edition 2 4 803s612 fm 6 21 Electrical system Wiring diagrams Electrical system ...
Page 185: ...Options ...
Page 194: ...7 10 SHB 803 en Edition 2 4 803s710 fm Options ...